Gate valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a gate valve which comprises an upper valve body. A lower valve body; a valve plate; a lifting mechanism; the pressing mechanism comprises a plurality of upper pressing units, a plurality of upper pressing blocks, a plurality of lower pressing pieces and a lower pressing transverse strip. The upper pressing unit is arranged at the top of the valve plate, the lower pressing transverse strip is arranged at the bottom of the valve plate, and the valve plate is gradually and respectively extruded by the upper pressing block and the lower pressing piece during descending, so that when the valve plate descends to the bottom, the valve plate can be tightly pressed to be tightly attached, the valve plate can stably ascend and descend, and the friction resistance is small; the valve plate can be tightly attached, the stable sealing performance is kept in the high-temperature environment, the service life is prolonged, and the sealing effect after long-term use is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, specifically relating to a slide gate valve. Background Technology

[0002] A slide gate valve is a commonly used valve device for controlling fluid media in pipelines. It is widely used in petroleum, natural gas, chemical, and water supply industries, primarily to cut off or connect the flow of fluid within a pipeline. Its working principle typically involves an electric actuator driving a valve plate to move up and down, creating a seal between the valve plate and the valve body inlet, thereby controlling or completely cutting off the flow of the medium within the pipeline.

[0003] To ensure smooth valve plate movement and avoid excessive frictional resistance, existing slide gate valves typically do not allow for a fully tight seal between the valve plate and the valve body inlet. However, while this design effectively reduces valve plate friction, it leads to poor sealing, resulting in a leakage rate of approximately 1% even when the valve is fully closed, resulting in unsatisfactory performance.

[0004] Furthermore, the sealing performance of existing slide gate valves is particularly unstable under high-temperature conditions. In high-temperature environments ranging from 250°C to 450°C, the valve plate undergoes a certain degree of thermal expansion or deformation, which further exacerbates the poor sealing between the valve plate and the valve body inlet, leading to a significant increase in leakage rate, which can even reach around 3%. This decline in sealing performance can seriously affect the safety and reliability of the system in some applications requiring tight sealing. Utility Model Content

[0005] The purpose of this utility model is to provide a slide gate valve that solves the technical problem in the prior art that while maintaining the smooth lifting and lowering of the valve plate and reducing frictional resistance, the slide gate valve cannot ensure that the valve plate and the inlet can fit tightly together and maintain stable sealing performance in high-temperature environments.

[0006] This utility model discloses a slide gate valve, comprising:

[0007] The upper valve body has an internal upper valve chamber;

[0008] The lower valve body is located at the bottom of the upper valve body and has a lower valve cavity inside. It has an inlet and an outlet arranged opposite to each other on the front and rear sides, and the inlet, outlet and upper valve cavity are all connected to the lower valve cavity.

[0009] A valve plate is arranged vertically and disposed in the lower valve chamber, with its upper end inserted into the upper valve chamber, and is able to form a partition between the inlet and the outlet;

[0010] A lifting mechanism is located at the top of the upper valve body and is connected to the valve plate in a transmission manner.

[0011] The clamping mechanism includes:

[0012] Multiple pressure-pressing units are installed laterally at intervals on the top of the valve plate. Each pressure-pressing unit includes a bracket and a pressure-pressing component mounted on the bracket.

[0013] Multiple upper pressure blocks are installed on the rear side wall of the upper valve chamber, and each upper pressure block corresponds to one of the upper pressure components. Each upper pressure block has a pressing surface for contacting the upper pressure component.

[0014] Multiple pressing components are respectively located on both sides of the bottom end of the lower valve chamber.

[0015] A downward pressure bar is provided at the bottom of the valve plate and has a pressure-receiving surface for contacting the downward pressure member;

[0016] The extrusion surface and the pressure-bearing surface are both inclined from top to bottom towards the inlet.

[0017] This application provides an upper pressure unit at the top of the valve plate and a lower pressure bar at the bottom. As the valve plate descends, it is gradually compressed by the upper pressure block and the lower pressure component, respectively. This ensures that the valve plate can rise and fall smoothly with low frictional resistance, while maintaining a tight fit and stable sealing performance even at high temperatures. This extends the service life and ensures a good sealing effect after long-term use.

[0018] Based on the above technical solution, the solution of this application can be further improved as follows:

[0019] Preferably, both the upper and lower pressing components are rotatable rollers; this design allows for rolling contact, thereby significantly reducing frictional resistance and improving sealing stability.

[0020] Preferably, the lifting mechanism includes:

[0021] The screw is vertically arranged on the rear side of the upper valve body;

[0022] The sleeve is arranged vertically, with its upper end threaded onto the screw and its lower end inserted into the lower valve body.

[0023] A connecting seat is installed on the back of the valve plate and hinged to the sleeve;

[0024] A rotary drive unit is installed on the top of the upper valve body and is connected to the screw drive. This solution can stably and accurately drive the valve plate to rise and fall, while avoiding obstruction of the flow of the medium and allowing the screw to be placed externally for easy inspection and maintenance.

[0025] Preferably, the connecting seat has an elongated hole, and the bottom end of the sleeve has a horizontally arranged pin that passes through the elongated hole. This design helps to accommodate the slight tilt or offset that the valve plate may produce during the lifting process, ensuring that the valve plate can lift and lower smoothly, improving lifting stability and flexibility, and enhancing adaptability and reliability.

[0026] Preferably, the lifting mechanism includes:

[0027] A sealing sleeve is installed on the top of the lower valve body and slidably fitted outside the sleeve. This solution provides a tight sealing interface, preventing fluid leakage from the gap between the sleeve and the lower valve body, and ensuring stable performance and reliability during long-term operation.

[0028] Preferably, it includes:

[0029] An annular plate is nested within the inlet;

[0030] A sealing ring is disposed on the side of the annular plate near the valve plate;

[0031] Multiple reinforcing ribs are evenly spaced on the side of the annular plate away from the valve plate and connected to the peripheral wall of the outlet. This design ensures the sealing and structural stability of the outlet, preventing fluid leakage and improving the durability and reliability of the valve.

[0032] Preferably, the rear sidewall of the upper valve chamber is provided with multiple vertical grooves, and the upper pressure block is provided at the bottom of each vertical groove. This solution improves the structural compactness and reduces the manufacturing cost.

[0033] Preferably, it further includes:

[0034] Two sets of guide wheels are respectively rotatably located on the left and right sides of the lower valve chamber, and each set of guide wheels has multiple wheels, which are arranged vertically at intervals. This solution provides guidance and support for the lifting and lowering of the valve plate, making the lifting and lowering more stable and smooth. It can also prevent deviation or shaking during the lifting and lowering process, ensuring the sealing and stability of the valve.

[0035] Preferably, an inspection port is provided on the outer side of the upper valve body, and a door cover is detachably provided on the inspection port; this solution facilitates inspection and maintenance, and improves work efficiency and maintenance quality.

[0036] Preferably, cleaning ports are provided at the bottom of both the left and right sides of the lower valve body; this solution can facilitate the removal of dust, impurities or deposits accumulated inside the lower valve body.

[0037] Through the above technical solution, this utility model achieves the following beneficial effects:

[0038] 1. This application provides an upper pressure unit at the top of the valve plate and a lower pressure bar at the bottom. As the valve plate descends, it is gradually squeezed by the upper pressure block and the lower pressure component, respectively. This allows the valve plate to be pressed tightly to maintain a close fit when it reaches the bottom. This ensures that the valve plate can rise and fall smoothly with low frictional resistance, while also ensuring a close fit and maintaining stable sealing performance in high-temperature environments. This extends the service life and ensures a good sealing effect after long-term use.

[0039] 2. This application can stably and accurately drive the valve plate to rise and fall, and by connecting the lower valve chamber to the screw thread, it avoids obstructing the flow of the medium and allows the screw to be placed externally, thus facilitating inspection and maintenance. Attached Figure Description

[0040] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0041] Figure 1 This is a side cross-sectional view of the slide gate valve according to a specific embodiment of the present utility model;

[0042] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0043] Figure 3 for Figure 1 Enlarged view of point B in the middle;

[0044] Figure 4 for Figure 1 A side sectional view of the upper pressure unit in the slide gate valve shown;

[0045] Figure 5 for Figure 1 The front sectional view of the upper and lower valve bodies of the slide gate valve shown.

[0046] Figure 6 for Figure 1 The front view of the lower valve body of the slide gate valve shown;

[0047] Figure 7 for Figure 1 The diagram shows a top sectional view of the upper valve body of the slide gate valve.

[0048] Figure 8 for Figure 1 The diagram shows the structure of the valve plate in the slide gate valve.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Upper valve body; 2. Lower valve body; 3. Valve plate; 4. Lifting mechanism; 5. Clamping mechanism; 6. Annular plate; 7. Sealing ring; 8. Reinforcing rib; 9. Guide wheel;

[0051] 11. Upper valve chamber; 12. Vertical groove; 13. Inspection port; 14. Door cover; 21. Lower valve chamber; 22. Inlet; 23. Outlet; 24. Dust removal port; 41. Screw; 42. Sleeve; 43. Connecting seat; 44. Rotary drive unit; 45. Pin; 46. Sealing sleeve; 51. Upper pressure unit; 52. Upper pressure block; 53. Lower pressure component; 54. Lower pressure bar;

[0052] 431, elongated hole; 511, bracket; 512, upper pressing component; 521, extrusion surface; 541, pressure-bearing surface. Detailed Implementation

[0053] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0054] First, it should be noted that some directional terms used in the following description to clearly illustrate the technical solution of this utility model, such as the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," are all derived from the normal orientation of the components in the slide valve. They are only used to facilitate the description of this utility model and simplify the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0057] Example:

[0058] like Figures 1-4 and Figure 8As shown in the figure, this application discloses a slide gate valve for pipeline fluid medium control. Its specific structure includes: an upper valve body 1, a lower valve body 2, a valve plate 3, a lifting mechanism 4, and a pressing mechanism 5.

[0059] The upper valve body 1 has an upper valve chamber 11 inside, which is used to accommodate and guide the movement of the valve plate 3.

[0060] The lower valve body 2 is located at the bottom of the upper valve body 1. It has a lower valve chamber 21 inside and an inlet 22 and an outlet 23 arranged opposite to each other on the front and rear sides. The inlet 22, outlet 23 and the upper valve chamber 11 are all connected to the lower valve chamber 21 to realize the flow and cut-off of fluid.

[0061] The valve plate 3 is arranged vertically and is located in the lower valve chamber 21, with its upper end inserted into the upper valve chamber 11. It forms a barrier between the inlet 22 and the outlet 23 through lifting and lowering movements to control the flow of fluid.

[0062] The lifting mechanism 4 is located on the top of the upper valve body 1 and is connected to the valve plate 3 for driving the valve plate 3 to move up and down.

[0063] The clamping mechanism 5 includes: multiple upper pressing units 51, multiple upper pressing blocks 52, multiple lower pressing parts 53, and a lower pressing crossbar 54, configured as follows:

[0064] Multiple pressure units 51 are horizontally spaced on the top of the valve plate 3, such as Figure 8 As shown, each pressure unit 51 includes a bracket 511 and a pressure member 512 mounted on the bracket 511, which is used to apply pressure to the top of the valve plate 3 to enhance the sealing effect. It is preferred to have two units, but there is no specific limitation.

[0065] Multiple upper pressure blocks 52 are installed on the rear side wall of the upper valve chamber 11 and correspond one-to-one with the upper pressure member 512. The upper pressure block 52 has a pressing surface 521 for contacting the upper pressure member 512 and pressing and pushing it.

[0066] Multiple pressing members 53 are respectively disposed on both sides of the bottom end of the lower valve chamber 21 to provide additional pressing force on the bottom of the valve plate 3. They are preferably configured as two, but are not specifically limited.

[0067] The pressure bar 54 is located at the bottom of the valve plate 3 and has a pressure surface 541. The pressure surface 541 contacts the pressure member 53 and is used to apply a clamping force to the valve plate 3, thereby enhancing the sealing performance of the valve plate 3.

[0068] The extrusion surface 521 and the pressure-bearing surface 541 are both gradually inclined from top to bottom toward the inlet 22 to ensure that the upper pressure member 512 and the lower pressure bar 54 are gradually squeezed as they slide down with the valve plate 3, thereby driving the valve plate 3 to remain tightly fitted when closed.

[0069] For example, the cross-section of the upper pressure block 52 is an isosceles trapezoid, and the cross-section of the lower pressure bar 54 is a right triangle, but it is not limited to this and is not specifically limited.

[0070] The above technical solution works as follows:

[0071] When the gate is closed, the lifting mechanism 4 drives the valve plate 3 to descend vertically, causing the valve plate 3 to gradually fall from the upper valve chamber 11 into the lower valve chamber 21. Just as the valve plate 3 is about to block the inlet 22 and outlet 23, the pressing surface 521 of the upper pressure block 52 contacts the upper pressure member 512 in the corresponding upper pressure unit 51. Because the pressing surface 521 is inclined, the upper pressure member 512 is gradually compressed as it moves downwards, transmitting pressure to the valve plate 3, thus gradually applying pressure to the top of the valve plate 3. Simultaneously, the pressure-receiving surface 541 of the lower pressure bar 54 contacts the lower pressure member 53. Again, because the pressure-receiving surface 541 is inclined, the lower pressure bar 54 is gradually compressed as it moves downwards, transmitting pressure to the valve plate 3, thus gradually applying pressure to the bottom of the valve plate 3. Through the cooperation of these two mechanisms, the valve plate 3, when descending to the bottom, can use its own weight to maintain a tight seal with the inlet 22, thereby ensuring a sealing effect.

[0072] When the gate is opened, the lifting mechanism 4 drives the valve plate 3 to rise vertically. As the upper pressure member 512 and the lower pressure bar 54 move upward, they will gradually stop being squeezed. Therefore, the valve plate 3 will gradually loosen and separate. At this time, the friction force on the valve plate 3 will gradually decrease until it is zero, which extends the service life, ensures the sealing effect after long-term use, reduces the movement resistance of the valve plate 3, and reduces the energy consumption of the lifting mechanism 4.

[0073] In addition, when the valve plate 3 undergoes a certain degree of thermal expansion or deformation in a high-temperature environment of 250℃ to 450℃, it can also fit tightly because both its upper and lower ends are subjected to a certain clamping force.

[0074] This invention provides an upper pressure unit 51 at the top of the valve plate 3 and a lower pressure bar 54 at the bottom. As the valve plate 3 descends, it is gradually compressed by the upper pressure block 52 and the lower pressure member 53, respectively. This ensures that the valve plate 3 can be pressed tightly to maintain a close fit when it reaches the bottom. This ensures that the valve plate 3 can rise and fall smoothly with low frictional resistance, while also ensuring a tight fit and maintaining stable sealing performance in high-temperature environments. It also extends the service life and ensures a good sealing effect after long-term use.

[0075] In some embodiments, such as Figure 3 and Figure 4 As shown, both the upper pressing member 512 and the lower pressing member 53 are rotatable rollers.

[0076] The above design enables the upper pressing member 512 to roll into contact with the pressing surface 521 and the lower pressing member 53 to roll into contact with the pressure-bearing surface 541, thereby significantly reducing frictional resistance and improving sealing stability.

[0077] In this embodiment, it also includes: multiple support plates, which are respectively disposed on the left and right sides of the lower valve chamber 21 and located on the side of the lower pressure member 53 away from the lower pressure crossbar 54, for supporting the lower pressure member 53 to improve its structural strength and load-bearing capacity.

[0078] In some embodiments, such as Figures 1-3 As shown, the lifting mechanism 4 includes: a screw 41, a sleeve 42, a connecting seat 43, and a rotary drive unit 44, which are configured as follows:

[0079] The screw 41 is vertically arranged on the rear side of the upper valve body 1 and serves as the main transmission component, used to realize the lifting and lowering movement of the sleeve 42 by rotation;

[0080] The sleeve 42 is arranged vertically, with its upper end threaded onto the screw 41 and its lower end inserted into the lower valve body 2, which is used to drive the valve plate 3 to move up and down.

[0081] The connecting seat 43 is installed on the back of the valve plate 3 and hinged to the sleeve 42 to ensure that the valve plate 3 can maintain stable and smooth movement during the lifting process;

[0082] The rotary drive unit 44 is mounted on the top of the upper valve body 1 and is connected to the screw 41 for transmission. It is used to provide rotational power to drive the screw 41 to rotate in both directions.

[0083] When the rotary drive unit 44 is activated, it drives the screw 41 to rotate. Since the upper end of the sleeve 42 is threaded onto the screw 41, the rotation of the screw 41 is converted into the up-and-down movement of the sleeve 42. The sleeve 42 is connected to the valve plate 3 through the connecting seat 43, so the up-and-down movement of the sleeve 42 will cause the valve plate 3 to rise and fall. In this way, by controlling the rotation direction and speed of the rotary drive unit 44, the rising and falling height and speed of the valve plate 3 can be precisely controlled.

[0084] With the above settings, the valve plate 3 can be driven to rise and fall stably and accurately. Furthermore, by connecting the lower valve chamber 21 to the screw 41 by a threaded connection, the flow of the medium is not obstructed, and the screw 41 can be placed in the outside, thus facilitating inspection and maintenance.

[0085] In this embodiment, as Figure 3 As shown, the connecting seat 43 has an elongated hole 431 to provide a channel for the pin 45 to move within a certain range. The bottom end of the sleeve 42 has a horizontally arranged pin 45, which passes through the elongated hole 431.

[0086] It should be noted that, due to the presence of the elongated hole 431, the connecting seat 43 can also generate a certain displacement in the horizontal direction while vertically lifting and lowering, which helps to compensate for the lateral movement caused by the valve plate 3 being squeezed, and ensures that the valve plate 3 can be lifted and lowered smoothly and stably.

[0087] The above design helps to accommodate the slight tilt or offset of the valve plate 3 during the lifting process, ensuring that the valve plate 3 can be lifted and lowered smoothly, improving lifting stability and flexibility, and also enhancing adaptability and reliability.

[0088] In this embodiment, the lifting mechanism 4 includes a sealing sleeve 46, which is installed on the top of the lower valve body 2 and slidably sleeved outside the sleeve 42.

[0089] The above configuration provides a tight sealing interface, preventing fluid leakage from the gap between the sleeve 42 and the lower valve body 2, thus ensuring stable performance and reliability during long-term operation.

[0090] In some embodiments, such as Figure 1 , Figure 2 and Figure 6 As shown, it includes:

[0091] The annular plate 6, nested within the inlet 22, serves to provide support and a fixing structure;

[0092] The sealing ring 7 is located on the side of the annular plate 6 near the valve plate 3, and is used to provide a tight sealing interface to prevent fluid leakage from the gap between the valve plate 3 and the inlet 22.

[0093] Multiple reinforcing ribs 8 are evenly spaced on the side of the annular plate 6 away from the valve plate 3 and connected to the peripheral wall of the outlet 23 to increase the strength and rigidity of the annular plate 6.

[0094] Preferably, the sealing ring 7 is made of metal-wound graphite packing, which is temperature and wear resistant and has good self-lubricating properties, which can reduce friction and thus extend its service life.

[0095] The above configuration combines the supporting role of the annular plate 6, the sealing function of the sealing ring 7, and the structural reinforcement of the reinforcing rib 8, which together ensures the sealing performance and structural stability of the outlet 23. It can not only prevent fluid leakage, but also improve the durability and reliability of the valve.

[0096] In some embodiments, such as Figure 4 , Figure 5 and Figure 7 As shown, the rear side wall of the upper valve chamber 11 is provided with multiple vertical grooves 12, and the upper pressure block 52 is provided at the bottom of the vertical groove 12 in a corresponding manner, which improves the structural compactness of the upper valve chamber 11 and reduces the manufacturing cost.

[0097] In some embodiments, such as Figures 1-3 and Figure 5 As shown, it also includes: two sets of guide wheels 9, which are rotatably located on the left and right sides of the lower valve chamber 21 respectively, and each set of guide wheels 9 has multiple wheels, which are arranged vertically at intervals to ensure that the valve plate 3 is always uniformly supported and guided during the lifting and lowering process.

[0098] The above-mentioned settings provide guidance and support for the lifting and lowering of valve plate 3, making the lifting and lowering more stable and smooth, and also preventing deviation or shaking during the lifting and lowering process, thus ensuring the sealing and stability of the valve.

[0099] In some embodiments, such as Figures 1 to 3 and Figure 5 As shown, an inspection port 13 is provided on the outside of the upper valve body 1, and a door cover 14 is detachably provided on the outside of the inspection port 13.

[0100] Specifically, the cover 14 is used to close the access port 13 to prevent media leakage and dust from entering. The cover 14 and the access port 13 are usually fixed by bolt connection, flange connection or quick-release connection to facilitate quick opening and closing.

[0101] The above-mentioned design allows maintenance personnel to easily enter the upper valve body 1 for inspection and maintenance, improving work efficiency and maintenance quality. The removable door cover 14 covers the inspection port 13 to prevent dust from entering.

[0102] In some embodiments, cleaning ports 24 are provided at the bottom of both the left and right sides of the lower valve body 2, which can conveniently remove dust, impurities or deposits accumulated inside the lower valve body 2.

[0103] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0104] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A slide gate valve, characterized in that, include: The upper valve body has an internal upper valve chamber; The lower valve body is located at the bottom of the upper valve body and has a lower valve chamber inside. It has an inlet and an outlet arranged opposite to each other on the front and rear sides, and the inlet, outlet and upper valve chamber are all connected to the lower valve chamber. A valve plate is arranged vertically and disposed in the lower valve chamber, with its upper end inserted into the upper valve chamber, and is able to form a partition between the inlet and the outlet; A lifting mechanism is located at the top of the upper valve body and is connected to the valve plate in a transmission manner. The clamping mechanism includes: Multiple pressure-pressing units are installed laterally at intervals on the top of the valve plate. Each pressure-pressing unit includes a bracket and a pressure-pressing component mounted on the bracket. Multiple upper pressure blocks are installed on the rear side wall of the upper valve chamber, and each upper pressure block corresponds to one of the upper pressure components. Each upper pressure block has a pressing surface for contacting the upper pressure component. Multiple pressing components are respectively located on both sides of the bottom end of the lower valve chamber. A downward pressure bar is provided at the bottom of the valve plate and has a pressure-receiving surface for contacting the downward pressure member; The extrusion surface and the pressure-bearing surface are both inclined from top to bottom towards the inlet.

2. The slide gate valve according to claim 1, characterized in that, Both the upper and lower pressing components are rotatable rollers.

3. The slide gate valve according to claim 1, characterized in that, The lifting mechanism includes: The screw is vertically arranged on the rear side of the upper valve body; The sleeve is arranged vertically, with its upper end threaded onto the screw and its lower end inserted into the lower valve body. A connecting seat is installed on the back of the valve plate and hinged to the sleeve; A rotary drive unit is mounted on the top of the upper valve body and is connected to the screw drive.

4. The slide gate valve according to claim 3, characterized in that, The connecting seat has an elongated hole, and the bottom end of the sleeve has a horizontally arranged pin that passes through the elongated hole.

5. The slide gate valve according to claim 3, characterized in that, The lifting mechanism includes: A sealing sleeve is installed on the top of the lower valve body and slidably sleeved outside the sleeve.

6. The slide gate valve according to claim 1, characterized in that, include: An annular plate is nested within the inlet; A sealing ring is disposed on the side of the annular plate near the valve plate; Multiple reinforcing ribs are evenly spaced on the side of the annular plate away from the valve plate and are connected to the peripheral wall of the outlet.

7. The slide gate valve according to claim 1, characterized in that, The rear side wall of the upper valve chamber is provided with multiple vertical grooves, and the upper pressure block is provided at the bottom of the vertical groove in a corresponding manner.

8. The slide gate valve according to claim 1, characterized in that, Also includes: Two sets of guide wheels are respectively rotatably located on the left and right sides of the lower valve chamber, and each set of guide wheels has multiple wheels, which are arranged vertically at intervals.

9. The slide gate valve according to claim 1, characterized in that, An inspection port is provided on the outside of the upper valve body, and a door cover is detachably provided on the outside of the inspection port.

10. The slide gate valve according to claim 1, characterized in that, The lower valve body has cleaning ports on both the left and right bottom ends.

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