Advection sealing valve for chemical production and using method of advection sealing valve

Abstract

The advection sealing valve comprises a valve body, valve covers are fixedly connected to the two axial ends of the valve body, an input port and an output port are formed in the valve body, a valve seat dividing an inner cavity of the valve body into two valve chambers is fixedly arranged in the valve body, a valve port is formed in the valve seat, and the input port and the output port communicate with the two valve chambers correspondingly; the valve further comprises a sealing piece located in the valve chamber, the sealing piece comprises a valve rod extending in the axial direction and a valve head set in sealing fit with the valve seat, a first counter bore and a second counter bore are sequentially inwards formed in the end, facing the valve seat, of the valve head set, the diameter of the first counter bore is smaller than that of the second counter bore, and a flat pressing hole communicated with the second counter bore is formed in the side wall of the valve head set. A balance valve head in sealing fit with the first counter bore is arranged in the second counter bore, one end of the valve rod is fixedly connected with the balance valve head, and the other end of the valve rod penetrates through the valve deck and extends to the outside. Wear parts can be replaced conveniently, and opening and closing of the valve head set are smoother and labor-saving by balancing internal and external pressure of the valve head set.

Description

Technical Field

[0001] The present invention relates to the technical field of stop valves, in particular to a horizontal flow sealing valve for chemical production and a use method thereof. Background Art

[0002] In chemical production, some chemical pipelines transport toxic, harmful, flammable, and explosive gases, and it is necessary to ensure that the valves on the pipelines have good sealing properties. Patent CN105387220A discloses a multi-purpose stop valve with a replaceable sealing valve seat, including a valve housing, a valve core, and a valve cover, which are detachably connected to the valve body; an inlet and an outlet are provided on both sides of the valve body; the valve core includes a sealing unit, which includes a valve stem and a valve head group extending from the valve cover into the hollow valve body cavity, and a hollow replaceable sealing valve seat is provided corresponding to the valve head group, the outer wall of the replaceable sealing valve seat is sealed with the inner wall of the hollow valve body, and the end face of the replaceable sealing valve seat is sealed with the end face of the valve head group; a detection hole communicating with the inner cavity of the sealing valve seat is provided on the outer wall of the valve body, and an annular groove is provided on the inner wall of the valve body or the outer wall of the replaceable sealing valve seat to communicate with the detection hole. A check ring is provided at one end of the replaceable sealing valve seat, and a positioning pin is provided on the check ring. Different combinations can be made according to needs: such as a stop valve at one end and a regulating valve at the other end, a check valve at the upper end and a stop valve at the lower end, etc. It has the advantages of replaceable sealing valve seat, low cost and good sealing effect.

[0003] While this patent primarily addresses the inconvenience of replacing the valve housing and valve seat, the valve head assembly and valve stem remain a monolithic structure and require complete replacement upon wear. Furthermore, when media enters the valve body, the pressure on the end of the valve head assembly near the valve seat is lower than the pressure on the end away from the seat, creating a pressure differential between the inside and outside of the valve head assembly. This makes opening and closing the valve more laborious and inconvenient. Summary of the Invention In response to the deficiencies in the prior art, the present invention provides a horizontal flow sealing valve for chemical production and a method of use thereof, which has higher sealing performance and facilitates replacement of worn parts. When the valve is opened, the fluid flows horizontally to the outlet, reducing flow resistance and kinetic energy loss. In addition, by balancing the internal and external pressures of the valve head group during use, the opening and closing of the valve head group can be smoother and more labor-saving.

[0004] The present invention is achieved through the following technical solution: a horizontal flow sealing valve for chemical production, including a valve body, an input port and an output port being provided on the valve body, a valve seat being fixedly provided in the valve body for dividing the inner cavity of the valve body into two valve chambers, the input port and the output port being communicated with the two valve chambers respectively, a sealing member being provided in the valve chamber and sealingly matched with the valve seat, the sealing member including a valve stem and a valve head group, a first countersunk hole and a second countersunk hole being sequentially opened inwardly at one end of the valve head group facing the valve seat, a flat pressure hole being opened on the side wall of the valve head group and communicating with the second countersunk hole, a balancing valve head sealingly matched with the first countersunk hole being installed in the second countersunk hole, one end of the valve stem being connected to the balancing valve head, and the other end of the valve stem extending to the outside of the valve body.

[0005] When this solution is used, a first countersunk hole and a second countersunk hole connected to the valve port are opened in the valve head group. The movement of the balancing valve head is driven by the valve stem, and then the movement of the valve head group is driven to realize the opening and closing of the valve port. When the balancing valve head opens the first countersunk hole, the high-pressure fluid outside the valve head group enters the first countersunk hole through the equalizing hole, thereby balancing the pressure at both ends of the valve head group, making it smoother and more labor-saving when the valve head group opens the valve port. When the balancing valve head closes and seals the first countersunk hole, the water inside the valve head group is discharged to the outside of the valve head group through the equalizing hole, so that the balancing valve head can more smoothly close the first countersunk hole and close the sealing valve head at the same time, realizing the sealing of the valve port, and the valve head group closes more labor-saving and smooth.

[0006] As an optimization, the valve head group includes a sealing valve head, a sleeve, a cover and the balancing valve head. One end of the sealing valve head is opposite to the valve seat, the sleeve is sleeved on the other end of the sealing valve head and is detachably fixed to the sealing valve head, the cover is detachably fixed to the end of the sleeve away from the sealing valve head, the inner cavity of the sealing valve head is the first countersunk hole of the valve head group, and the inner cavity of the sleeve is the second countersunk hole of the valve head group.

[0007] As an optimization, the valve seat is an annular structure, with the outer wall of the valve seat fixedly connected to the inner wall of the valve body. One end of the valve body is open to form the inlet, and the other end is closed. The outlet is located on one side of the outer wall of the valve body. The sealing member is located within the valve chamber near the closed end of the valve seat, and the valve stem of the sealing member extends through the closed end of the valve body to the outside. This optimized valve seat has an annular structure and a larger diameter, making it suitable for conveying large flow media.

[0008] As an optimization, the valve body has an open end forming the input port and a closed end. An output port is provided on each side of the outer wall of the valve body. A seal is provided in the valve chamber on the side of the valve seat away from the closed end of the valve body. The stem of the seal extends through the closed end of the valve body to the outside. The input and output ports of this optimization solution are arranged vertically, making it suitable for connecting to vertical pipelines. The two output ports provided on the valve body enable split flow output.

[0009] As an optimization, the valve body is sealed at both ends, with an output port and an input port respectively located concentrically on either side of the outer wall. A seal is located within one valve chamber, with the seal's stem extending through one end of the valve body. This optimized solution features parallel input and output ports, making it suitable for connection to a horizontal flow pipeline.

[0010] As an optimization, the valve seat includes an annular first valve core and an annular first partition plate. The outer wall of the first partition plate is sealed and fixed to the inner wall of the valve body, and the outer wall of the first valve core is sealed and fixed to the inner wall of the first partition plate. The valve seat of this optimization solution connects the two valve chambers through the first valve core and has a smaller diameter, making it suitable for conveying low-flow media.

[0011] As an optimization, both ends of the valve body are sealed, with an output port and an input port respectively provided on either side of the outer wall of the valve body. The output port and the input port are arranged concentrically. Seals are provided in both valve chambers, and the valve stems of the two seals extend through the same end of the valve body or through both ends of the valve body to the outside. This optimization solution provides seals in both valve chambers, and the two seals seal both sides of the valve seat, thereby improving the sealing effect of the valve.

[0012] As an optimization, the valve seat includes an annular second valve core, the outer wall of the second valve core is sleeved with a annular second partition plate, the outer diameter of the second partition plate is smaller than the inner diameter of the valve body, the outer wall of the second partition plate is symmetrically fixed with two vertically extending vertical partition plates, the two vertical partition plates are fixed to the inner wall of the valve body on one side away from the second partition plate, the two vertical partition plates are located between the input port and the output port, the upper ends of the two vertical partition plates are fixed with a semi-annular upper partition plate on one side close to the output port, the outer wall of the upper partition plate is fixed to the inner wall of the valve body, the inner wall of the upper partition plate is fixed with a semi-annular first side partition, the bottom of the first side partition is fixed to the second partition plate, the two ends of the first side partition are fixed to the two vertical partitions, the lower ends of the two vertical partitions are fixed with a semi-annular lower partition plate on one side close to the input port, the outer wall of the lower partition plate is fixed to the inner wall of the valve body, the inner wall of the lower partition plate is fixed with a semi-annular second side partition, the top of the second side partition is fixed to the second partition plate, and the two ends of the second side partition are fixed to the two vertical partitions.

[0013] As an optimization, a vent tube is provided through the second valve core, one end of which communicates with the inner cavity of the second valve core and the other end communicates with the exterior of the valve body. An on-off valve is mounted on the vent tube. This optimization solution allows high-pressure gas to be introduced into the second valve core through the vent tube, creating an airtight structure. Because the pressure of the high-pressure gas is greater than the pressure of the delivered gas, this prevents the delivered gas from leaking into the second valve core, further improving the sealing effect.

[0014] As an optimization, the top of the second valve core is provided with an annular ventilation groove extending downward, and the valve seat is provided with an air inlet and exhaust hole connected to the ventilation groove. Both the air inlet and exhaust holes are connected to the exterior of the valve body, and an on-off valve is installed at one end of each hole located outside the valve body. This optimization solution allows high-pressure gas to be introduced into the ventilation groove of the second valve core through the air inlet hole, thereby forming an airtight seal between the valve head assembly and the upper end surface of the second valve core, preventing the delivered gas from leaking into the second valve core and improving the sealing effect.

[0015] A method for using the above-mentioned horizontal flow sealing valve for chemical production includes the following steps: the valve stem slides to drive the balancing valve head to slide away from the valve seat, and the medium outside the valve head group enters the interior of the valve head group through the equalizing hole, so that the inside and outside are connected and the pressure is balanced; as the valve stem continues to slide, the balancing valve head drives the valve head group to move away from the valve seat, thereby opening the valve port; By pushing the balancing valve head by the valve stem to slide toward the valve seat, the medium outside the valve head group is discharged to the outside through the flat pressure hole, causing the balancing valve head to press the first countersunk hole, thereby sealing the first countersunk hole. As the valve stem pushes the balancing valve head to continue moving, the valve head group can be pushed toward the valve seat to press the valve seat, thereby isolating the two valve chambers and closing the valve port.

[0016] The beneficial effects of the present invention are as follows: a first countersunk hole and a second countersunk hole connected to the valve port are provided in the valve head group, and the movement of the balancing valve head is driven by the valve stem, and then the movement of the sealing valve head is driven to realize the opening and closing of the valve port. When the balancing valve head opens the first countersunk hole, the conveying medium outside the valve head group enters the first countersunk hole through the equalizing hole, thereby balancing the pressure at both ends of the valve head group, making it smoother and more labor-saving when the valve head group opens the valve port. When the balancing valve head seals the first countersunk hole, the conveying medium inside the valve head group is squeezed out to the outside of the valve head group through the equalizing hole, thereby enabling the balancing valve head to more smoothly close the first countersunk hole and simultaneously close the sealing valve head, thereby realizing the sealing of the valve port, and being more labor-saving and smooth when closing; The valve can be sealed with one seal or two seals according to the usage, which is flexible and convenient to use; The sealing valve head, bushing and cover are connected by bolts to form a valve head group, which is convenient for disassembly and replacement of parts; High-pressure gas can be passed between the valve seat and the sealing element to form an airtight seal structure, further improving the sealing effect of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a cross-sectional view of Example 1; Figure 2 is a cross-sectional view of the seal; Figure 3 This is a cross-sectional view of Example 2; Figure 4 A cross-sectional view of Example 3 Figure 5 Schematic diagram of the valve seat structure of Example 3; Figure 6 This is a cross-sectional view of Example 4; Figure 7 Schematic diagram of the valve seat structure of Example 4; Figure 8 is a cross-sectional view of Example 6; Figure 9 This is a cross-sectional view of Example 7; Figure 10 This is a cross-sectional view of Example 8; Figure 11 1 is a top view of the internal structure of the valve body of Example 7 and Example 8; Figure 12 Schematic diagram of the valve seat structure of Example 5; Figure 13 This is a bottom view of the valve seat of Example 5; As shown in the figure: 1. Valve body, 2. Valve cover, 3. Valve seat, 31a, second valve core, 32a, second partition plate, 33a, vertical partition plate, 34a, upper partition plate, 35a, lower partition plate, 36a, first side partition, 37a, second side partition, 31b, first valve core, 32b, first partition plate, 4. Valve head group, 41, sealing valve head, 42, bushing, 43, sealing cover, 44, first countersunk hole, 45, second countersunk hole, 46, flat pressure hole, 5. Balancing valve head, 6. Valve stem, 7. Input port, 8. Output port, 9. Through hole, 10. Reinforcement rib, 11. Valve chamber, 12. Vent groove, 13. Air inlet hole, 14. Air inlet pipe, 15. Exhaust hole, 16. Exhaust pipe, 17. Switch valve, 18. Vent pipe. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0019] Example 1: like Figure 1 、 2 As shown, a horizontal flow sealing valve for chemical production includes a valve body 1, which is provided with an input port 7 and an output port 8. A valve seat 3 is fixed in the valve body 1 to divide the inner cavity of the valve body 1 into two valve chambers 11. The valve seat 3 is provided with a valve port, and the input port 7 and the output port 8 are respectively connected to the two valve chambers 11.

[0020] Preferably, a reinforcing rib 10 is fixedly connected to the valve opening of the valve seat 3 , and the reinforcing rib is in a grid shape and is used to enhance the strength of the valve opening.

[0021] The valve chamber 11 is provided with a sealing member that seals against the valve seat 3. The sealing member comprises a valve stem 6 extending axially along the valve body 1 and a valve head assembly 4. The valve head assembly 4 seals against the valve seat 3. A first countersunk hole 44 and a second countersunk hole 45 are defined inwardly, one end of the valve head assembly 4 facing the valve seat 3. The first countersunk hole 44 has a smaller diameter than the second countersunk hole 45. A pressure-equalizing hole 46 is defined on the sidewall of the valve head assembly 4, communicating with the second countersunk hole 45. A balancing valve head 5 seals against the first countersunk hole 44. One end of the valve stem 6 is connected to the balancing valve head 5, while the other end of the valve stem 6 extends outside the valve body 1. In this embodiment, the valve stem 6 is slidably connected to the valve body 1. A sealing ring is provided between the valve stem 6 and the valve body 1, ensuring a sealed sliding connection and leak-tightness. The upward and downward movement of the valve stem 6 drives the upward and downward movement of the balancing valve head 5.

[0022] The valve body 1, valve seat 3, valve head assembly 4, balancing valve head 5, and valve stem 6 are concentrically arranged, so that the valve port, first counterbore 44, and second counterbore 45 of the valve seat 3 are coaxial, thereby achieving interconnection between the valve port, the first counterbore, and the second counterbore. The outer diameter of the balancing valve head 5 is adapted to the aperture of the second counterbore 45. Since the aperture of the first counterbore 44 is smaller than the aperture of the second counterbore 45, the balancing valve head 5 slides in the second counterbore 45 and presses onto the first counterbore 44, thereby sealing the first counterbore 44.

[0023] Specifically, the valve head group 4 includes a sealing valve head 41, a bushing, a cover 43 and the balancing valve head 5. One end of the sealing valve head 41 is opposite to the valve seat 3, and the bushing 42 is sleeved on the other end of the sealing valve head 41 and fixed to the sealing valve head 41 by bolts. The cover 43 is fixed to the end of the bushing 42 away from the sealing valve head 41 by bolts. The sealing valve head 41 is a hollow sleeve structure, and the inner cavity of the sealing valve head 41 is the first countersunk hole 44 of the valve head group 4, and the inner cavity of the bushing 42 is the second countersunk hole 45 of the valve head group. Two equalization holes 46 are symmetrically opened on the side wall of the bushing 42, and the equalization holes 46 are perpendicular to the second countersunk hole 45. The movable sealing cover is movably arranged in the bushing 42, and when the balancing valve head 5 seals the first countersunk hole 44, the two equalization holes 46 are also sealed. The sealing valve head 41, the bushing 42 and the cover 43 are connected by bolts to form a valve head group, which is convenient for disassembly and replacement of parts.

[0024] The valve stem 6 drives the balancing valve head 5 to open and close the first countersunk hole 44. When the balancing valve head 5 seals the first countersunk hole 44, the movement of the balancing valve head squeezes the medium inside the valve head assembly 4 out through the equalizing hole 46, allowing the balancing valve head 5 to more smoothly close the first countersunk hole 44 and drive the sealing valve head 41 to move, allowing the valve head assembly to smoothly seal the valve port. When the balancing valve head 5 opens the first countersunk hole 44, the medium outside the valve head assembly 4 enters the interior through the equalizing hole 46, thereby balancing the internal and external pressures of the valve head assembly 4, making the valve opening smoother and more labor-saving.

[0025] The valve seat 3 described in this embodiment is a circular ring structure, and the outer wall of the valve seat 3 is fixedly connected to the inner wall of the valve body 1.

[0026] Specifically, the inner diameter of the valve seat 3 in this embodiment is the valve port of the valve seat 3 , and the outer diameter of the sealing valve head 41 is adapted to the outer diameter of the annular valve seat 3 , so that the sealing valve head 41 can be pressed onto the valve seat 3 , thereby sealing the valve port.

[0027] In this embodiment, the valve body 1 is open at one end to form the input port 7, and is closed at the other end. An output port 8 is provided on one side of the outer wall of the valve body 1. The valve seat 3 is lower than the output port 8. The sealing member is located within a valve chamber 11 on the side of the valve seat 3 near the closed end of the valve body. The valve stem 6 of the sealing member extends through the closed end of the valve body to the exterior.

[0028] Specifically, one end of the valve body 1 is bolted to the valve cover 2 to form a closed end of the valve body. One end of the valve stem 6 passes through the cover 43 and is fixed to the balancing valve head 5, while the other end extends through the valve cover 2 to the outside. A sealing ring is also provided between the valve stem 6 and the cover 43 to achieve a sealed sliding connection between the two, improving the sealing performance.

[0029] A method for using a horizontal flow sealing valve for chemical production, comprising the following steps: when the valve is opened, the valve stem 6 slides to drive the balancing valve head 5 to slide away from the valve seat 3, and the medium outside the valve head group 4 enters the valve head group 4 through the equalizing hole 46, so that the inside and outside are connected and the pressure is balanced. As the valve stem 6 continues to slide, the balancing valve head 5 drives the valve head group 4 to slide away from the valve seat 3, thereby opening the valve port; When closing the valve, the valve stem 6 pushes the balancing valve head 5 to slide toward the valve seat 3, and the medium inside the valve head group 4 is discharged to the outside through the equalizing hole 46, so that the balancing valve head 5 presses the first countersunk hole 44, thereby sealing the first countersunk hole. As the valve stem 6 pushes the balancing valve head 5 to continue to move, the valve head group 4 can be pushed toward the valve seat 3 to press the valve seat 3, thereby isolating the two valve chambers 11 and closing the valve port.

[0030] Example 2: like Figure 3 As shown, this embodiment differs from Example 1 in that: The valve body 1 of this embodiment is provided with an output port 8 on each side of its outer wall, and the valve seat 3 is provided in a valve chamber 11 on the side away from the closed end of the valve body. The valve stem 6 of the seal extends through the closed end of the valve body to the outside. By providing two output ports 8 on the valve body of this embodiment, split flow output is achieved.

[0031] The valve seat 3 of this embodiment includes an annular first valve core 31b and an annular first partition plate 32b. The outer wall of the first partition plate 32b is sealed and fixedly connected to the inner wall of the valve body 1. The outer wall of the first valve core 31b is sealed and fixedly connected to the inner wall of the first partition plate 32b. The valve seat 3 of this embodiment is directly fixedly connected to the inner wall of the valve body 1 via the first partition plate 32b, thereby isolating the inner cavity of the valve body 1 into two valve chambers 11, resulting in a simpler structure and easier processing.

[0032] The inner cavity of the first valve core 31b is the valve port of the valve seat 3. The first valve core 31b is concentrically arranged with the valve body 1. The outer diameter of the sealing valve head 41 is adapted to the outer diameter of the first valve core 31b, so that the sealing valve head 41 can be pressed onto the first valve core 31b, thereby sealing the valve port.

[0033] In this embodiment, the sealing cover of the valve head group 4 is a blind cover. One end of the valve stem 6 of the sealing member extends to the outside through the valve cover 2, and the other end of the valve stem 6 passes through the valve port of the valve seat 3 and the first countersunk hole 44 in sequence, and is thereby fixedly connected to the balancing valve head 5 in the second countersunk hole 45.

[0034] Example 3: like Figure 4 、 5 As shown, this embodiment differs from Example 2 in that the valve body 1 in this embodiment is sealed at both ends. An output port 8 and an input port 7 are respectively provided on the outer wall of the valve body 1, and the output port 8 and the input port 7 are arranged concentrically. The sealing member is located within one of the valve chambers 11, and the valve stem 6 of the sealing member extends through one end of the valve body 1 to the exterior.

[0035] Specifically, in this embodiment, both ends of the valve body 1 are fixed with valve covers 2 by bolts, and the seal is arranged in one of the valve chambers. One end of the valve stem 6 of the seal passes through the valve cover 2 on the same side and extends to the outside, and the other end of the valve stem 6 passes through the sealing cover 43 and is fixed to the balancing valve head 5.

[0036] To achieve concentric placement of the output port 8 and the input port 7, the axis of the valve body 1 in this embodiment forms an angle with the axes of the input and output ports 7 and 8. After installation, the valve body 1 is tilted, maintaining a level position between the input and output ports 7 and 8. When the valve is opened, fluid flows horizontally to the output port 8, reducing flow resistance and kinetic energy loss. During maintenance, the lower bonnet 2 can be removed to inspect the sealing surface and clean accumulated dust.

[0037] Example 4: like Figure 6 、 7 As shown, the difference between this embodiment and embodiment 3 is that the valve body 1 of this embodiment is vertically arranged to the input port 7 and the output port 8.

[0038] The valve seat 3 of this embodiment includes an annular second valve core 31a, and the outer wall of the second valve core 31a is fixedly connected with an annular second partition plate 32a. The outer diameter of the second partition plate 32a is smaller than the inner diameter of the valve body 1. The outer wall of the second partition plate 32a is symmetrically fixed with two vertically extending vertical partition plates 33a. The two vertical partition plates are fixedly connected to the inner wall of the valve body 1 on one side away from the second partition plate. The two vertical partition plates 33a are located between the input port 7 and the output port 8. The upper end of the two vertical partition plates 33a and the side close to the output port 8 are fixedly connected with a semi-annular upper partition plate 34a. The outer wall of the upper partition plate 34a is fixedly connected to the valve body. 1 is fixed to the inner wall of the valve body 1, a semi-annular first side partition 36a is fixed to the inner wall of the upper partition 34a, the bottom of the first side partition 36a is fixed to the second partition plate 32a, both ends of the first side partition 36a are fixed to the two vertical partitions 33a, a semi-annular lower partition 35a is fixed to the lower ends of the two vertical partitions 33a and one side close to the input port 7, the outer wall of the lower partition 35a is fixed to the inner wall of the valve body 1, a semi-annular second side partition 37a is fixed to the inner wall of the lower partition 35a, the top of the second side partition 37a is fixed to the second partition plate 32a, and both ends of the second side partition are fixed to the two vertical partitions 33a.

[0039] In this embodiment, the inner cavity of the second valve core 31a serves as the valve port of the valve seat 3. The outer diameter of the sealing valve head 41 matches that of the second valve core 31a, allowing the sealing valve head 41 to press against the second valve core 31a, thereby sealing the valve port. The second valve core 31a is concentrically arranged with the valve body 1, with its central axis perpendicular to the central axes of the input port 7 and the output port 8. In this embodiment, the second partition plate 32a of the valve seat 3 is smaller than the inner diameter of the valve body 1, creating an annular gap between the second partition plate 32a and the inner wall of the valve body 1. The second partition plate 32a, through two vertical partitions 33a, moves the upper partition plate 34a upward to avoid the output port 8 and cooperates with the first side partition 36a to seal half of the annular gap. The lower partition plate 35a moves downward to avoid the input port 7 and cooperates with the second side partition 37a to seal the other half of the annular gap, thereby dividing the inner cavity of the valve body 1 into two valve chambers 11, enabling communication between the input port 7 and the output port 8, respectively. Under the premise that the input port 7 and the output port 8 need to be kept horizontally relative to each other, the valve body 1 can be set to a vertical shape to achieve horizontal flow in and out of the fluid, reduce flow resistance, and reduce kinetic energy loss.

[0040] Example 5: like Figure 12 、 13 As shown, the difference between this embodiment and embodiment 4 is that the valve seat 3 of this embodiment is not provided with a lower partition 35a, and the second side partition 37a of the valve seat and the two vertical partitions 33a form a center dividing surface, and the lower end surfaces of the second side partition 37a and the two vertical partitions 33a are in sealing contact with the valve cover 2 at the bottom of the valve body 1, thereby dividing the valve body into two valve chambers 11.

[0041] This embodiment forms two valve chambers 11 in the valve body by providing a central dividing surface that seals flush with the valve cover 2 at the bottom of the valve body 1. Since this embodiment does not include a lower partition 35a, both valve chambers 11 communicate with the valve cover 2 at the bottom of the valve body 1. With this structure, dust accumulation in both valve chambers 11 can be cleared by opening the valve cover 2 at the bottom of the valve body 1. In contrast, in Example 4, opening the bottom valve cover only clears dust accumulation in the lower valve chamber, making this embodiment more convenient to use.

[0042] Example 6: like Figure 8 As shown, the difference between this embodiment and embodiment 4 is that an annular ventilation groove 12 is formed downwardly on the top of the second valve core 31a of this embodiment. An air inlet hole 13 and an air outlet hole 15 are formed on the valve seat 3, which are connected to the ventilation groove 12. The air inlet hole 13 and the air outlet hole 15 are both connected to the outside of the valve body 1. On-off valves 17 are provided at the ends of the air inlet hole 13 and the air outlet hole 15 located outside the valve body 1.

[0043] Specifically, an outer end of the air inlet 13 is connected to an air inlet pipe 14 , an outer end of the air outlet 15 is connected to an air outlet pipe 16 , and the switch valve 17 is installed on the air inlet pipe 14 and the air outlet pipe 16 .

[0044] During use of this embodiment, the air inlet pipe 14 is connected to an external air source, and the valve stem 6 pushes the valve head assembly 4 into a sealed connection with the second valve core 31a of the valve seat 3. High-pressure gas is then introduced into the vent groove 12 through the air inlet pipe 14. Once the high-pressure gas fills the vent groove 12, an airtight seal is formed between the valve head assembly 4 and the second valve core 31a. Because the pressure of the high-pressure gas is greater than the pressure of the medium being delivered, leakage of the medium through the gap is prevented, improving the sealing performance of the valve.

[0045] Example 7: like Figure 9 、 11 As shown, the difference between this embodiment and embodiment 4 is that: in this embodiment, the two valve chambers 11 are both provided with the sealing members, and the valve stems 6 of the two sealing members pass through the same end of the valve body 1 and extend to the outside.

[0046] Specifically, one end of the valve stem 6 of one of the seals passes through the sealing cover 43 and is fixed to the outer wall of the balancing valve head 5, and the other end of the valve stem 6 passes through the valve cover 2 at the end of the valve chamber 11 where it is located and extends to the outside, and a through hole 9 is opened on this valve stem 6, which passes through the valve stem 6 and the balancing valve head 5 of this seal in sequence.

[0047] One end of the valve stem 6 of the other sealing member is fixedly connected to the inner wall of the balancing valve head, and the other end of the valve stem extends to the outside through the through hole 9, so that both valve stems pass through the same end of the valve body. A sealing ring is provided between the valve stem 6 and the through hole 9, and the two are connected in a sealed sliding manner to improve the sealing performance.

[0048] In this embodiment, the valve stems 6 of the two sealing members are arranged on the same side, which reduces the overall volume of the valve, reduces space occupation, and facilitates operation.

[0049] Preferably, in this embodiment, a vent tube 18 is provided through the second valve core 31a. One end of the vent tube 18 communicates with the inner cavity of the second valve core 31a, and the other end communicates with the exterior of the valve body 1. An on-off valve 17 is mounted on the vent tube. Specifically, the vent tube 18 is perpendicular to the second valve core 31a. One end of the vent tube extends through the outer wall of the second valve core 31a, thereby communicating with the inner cavity of the second valve core 31a. The other end of the vent tube extends through the valve body, thereby communicating with the exterior of the valve body 1.

[0050] This embodiment utilizes two sealing members to seal the two sides of the valve seat 3, significantly improving the sealing effect. After the sealing members are sealed with the valve seat 3, high-pressure gas is injected into the inner cavity of the second valve core 31a on the vent tube 18, filling the inner cavity of the second valve core 31a with the first counterbore 44 with high-pressure gas to form an airtight seal, thus improving the sealing effect.

[0051] Example 8: like Figure 10 、 11As shown, the difference between this embodiment and embodiment 7 is that the valve stems 6 of the two sealing members of this embodiment pass through both ends of the valve body 1 and extend to the outside.

[0052] Specifically, the two seals of this embodiment are symmetrically arranged around the valve seat 3. One end of the valve stem 6 of each seal passes through its respective sealing cover 43 and is fixedly connected to the outer wall of the balancing valve head 5. The other end of the valve stem 6 passes through the valve cover 2 at the end of its respective valve chamber 11 and extends to the outside.

[0053] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A horizontal flow sealing valve for chemical production, comprising a valve body (1), the valve body being provided with an input port (7) and an output port (8), the valve body (1) being provided with a valve seat (3) for dividing the inner cavity of the valve body (1) into two valve chambers (11), the input port (7) and the output port (8) being communicated with the two valve chambers (11) respectively, and a sealing member being provided in the valve chamber (11) for sealingly cooperating with the valve seat, characterized in that: The sealing member comprises a valve stem (6) and a valve head group (4); a first countersunk hole (44) and a second countersunk hole (45) are sequentially provided inwardly on one end of the valve head group (4) facing the valve seat (3); a flat pressure hole (46) communicating with the second countersunk hole (45) is provided on the side wall of the valve head group (4); a balancing valve head (5) sealingly matched with the first countersunk hole (44) is installed in the second countersunk hole (45); one end of the valve stem (6) is connected to the balancing valve head (5), and the other end of the valve stem (6) extends to the outside of the valve body.

2. The horizontal flow sealing valve for chemical production according to claim 1, characterized in that: The valve head group (4) includes a sealing valve head (41), a bushing (42), a cover (43) and the balancing valve head (5), one end of the sealing valve head (41) is opposite to the valve seat (3), the bushing (42) is sleeved on the other end of the sealing valve head (41) and is bolted to the sealing valve head (41), the cover (43) is bolted to one end of the bushing (42) away from the sealing valve head (41), the inner cavity of the sealing valve head (41) is the first countersunk hole (44) of the valve head group, and the inner cavity of the bushing (42) is the second countersunk hole (45) of the valve head group.

3. The horizontal flow sealing valve for chemical production according to claim 2, characterized in that: The valve seat (3) is a circular ring structure, and the outer wall of the valve seat (3) is fixedly connected to the inner wall of the valve body (1). One end of the valve body (1) is open to form the input port (7), and the other end is closed. One side of the outer wall of the valve body (1) is provided with the output port (8). The valve seat is provided with the sealing member in the valve chamber (11) near the closed end of the valve body, and the valve stem of the sealing member passes through the closed end of the valve body and extends to the outside.

4. The horizontal flow sealing valve for chemical production according to claim 2, characterized in that: One end of the valve body (1) is open to form the input port (7), and the other end is closed. An output port (8) is provided on each side of the outer wall of the valve body (1). The sealing member is provided in the valve chamber (11) on the side of the valve seat away from the closed end of the valve body, and the valve stem of the sealing member passes through the closed end of the valve body and extends to the outside.

5. The horizontal flow sealing valve for chemical production according to claim 2, characterized in that: Both ends of the valve body (1) are closed, and an output port (8) and an input port (7) are respectively provided on both sides of the outer wall of the valve body (1), and the output port and the input port are concentrically arranged. The sealing member is provided in one of the valve chambers (11), and the valve stem of the sealing member passes through one end of the valve body and extends to the outside.

6. The horizontal flow sealing valve for chemical production according to claim 4 or 5, characterized in that: The valve seat (3) comprises an annular first valve core (31b) and an annular first partition plate (32b); the outer wall of the first partition plate is sealed and fixedly connected to the inner wall of the valve body (1); and the outer wall of the first valve core (31b) is sealed and fixedly connected to the inner wall of the first partition plate (32b).

7. The horizontal flow sealing valve for chemical production according to claim 2, characterized in that: Both ends of the valve body (1) are closed, and an output port (8) and an input port (7) are respectively provided on both sides of the outer wall of the valve body (1), and the output port and the input port are concentrically arranged. The sealing members are provided in both valve chambers (11), and the valve stems of the two sealing members pass through the same end of the valve body (1) or pass through both ends of the valve body (1) and extend to the outside.

8. The horizontal flow sealing valve for chemical production according to claim 5 or 7, characterized in that: The valve seat (3) includes an annular second valve core (31a), an annular second partition plate (32a) is sleeved and fixedly connected to the outer wall of the second valve core (31a), the outer diameter of the second partition plate is smaller than the inner diameter of the valve body (1), and the outer wall of the second partition plate (32a) is symmetrically fixedly connected to two vertically extending vertical partition plates (33a), the two vertical partition plates (33a) are fixedly connected to the inner wall of the valve body (1) on the side away from the second partition plate, the two vertical partition plates (33a) are located between the input port (7) and the output port (8), and the upper ends of the two vertical partition plates (33a) are fixedly connected to a semi-annular upper partition plate (34a) on the side close to the output port (8), and the outer wall of the upper partition plate is fixedly connected to the valve body ( 1) The inner wall is fixed, the inner wall of the upper partition (34a) is fixed with a semi-circular first side partition (36a), the bottom of the first side partition (36a) is fixed with the second partition plate (32a), the two ends of the first side partition (36a) are fixed with the two vertical partitions (33a), the lower ends of the two vertical partitions (33a) are fixed with a semi-circular lower partition (35a) on one side close to the input port (7), the outer wall of the lower partition is fixed with the inner wall of the valve body (1), the inner wall of the lower partition (35a) is fixed with a semi-circular second side partition (37a), the top of the second side partition is fixed with the second partition plate (32a), and the two ends of the second side partition are fixed with the two vertical partitions (33a).

9. The horizontal flow sealing valve for chemical production according to claim 8, characterized in that: A vent pipe (18) is provided on the second valve core (31a), one end of the vent pipe is connected to the inner cavity of the second valve core (31a), and the other end is connected to the outside of the valve body (1). An on-off valve (17) is installed on the vent pipe.

10. The horizontal flow sealing valve for chemical production according to claim 8, characterized in that: An annular ventilation groove (12) is provided downwardly on the top of the second valve core (31a), and an air inlet (13) and an air outlet (15) are provided on the valve seat (3) and are connected to the ventilation groove (12). Both the air inlet and the air outlet are connected to the outside of the valve body, and a switch valve (17) is provided at one end of the air inlet and the air outlet located outside the valve body (1).

11. The method for using the horizontal flow sealing valve for chemical production according to any one of claims 1 to 5, 7, 9, and 10, characterized in that: The following steps are involved: The valve stem (6) slides to drive the balancing valve head (5) to slide in a direction away from the valve seat (3), and the medium outside the valve head group (4) enters the inside of the valve head group (4) through the equalizing hole (46), so that the inside and outside are connected to balance the pressure. As the valve stem (6) continues to slide, the balancing valve head (5) drives the valve head group (4) to slide in a direction away from the valve seat (3), thereby opening the valve port; By the valve stem (6) pushing the balancing valve head (5) to slide in the direction close to the valve seat (3), the medium inside the valve head group (4) is discharged to the outside through the equalizing hole (46), so that the balancing valve head (5) presses the first countersunk hole (44), thereby sealing the first countersunk hole. As the valve stem (6) pushes the balancing valve head (5) to continue to move, the valve head group (4) can be pushed to move close to the valve seat (3) to press the valve seat (3), thereby isolating the two valve chambers (11) and closing the valve port.

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