Knife gate valve

Abstract

This application discloses a knife gate valve, including a valve body module, a valve stem, a connector, and a drive module. The valve body module includes a gate and a valve body extending along a first direction. The valve body has an mounting cavity and a flow channel extending through it along a second direction. The gate is slidably disposed in the mounting cavity along the first direction. The valve stem is fixedly connected to the gate, extends out of the valve body, and is fixedly connected to the drive module. The connector is disposed between the valve body module and the drive module. The connector includes a main body and a connecting part. The main body is fixedly connected to the valve body. The drive module includes a mounting shell with an opening at one end and a drive component connected to the valve stem and placed in the mounting shell. The mounting shell is fixedly connected to the connecting part. The drive component drives the valve stem to reciprocate, so that the gate switches between a closed position that blocks the flow channel and an open position that opens the flow channel. This avoids loosening or damage to the connection between the valve stem and the gate due to excessive driving force of the drive component.

Description

Technical Field

[0001] This application relates to the field of valves, and in particular to a knife gate valve. Background Technology

[0002] Knife gate valves are widely used in industrial processes to control the on / off flow of fluids. Based on their actuation method, knife gate valves can be divided into manual and automatic types. In automatic knife gate valves, the actuation module controls the valve stem to open and close the gate, ensuring precise control of fluid flow. However, excessive force applied by the actuation module can cause loosening or damage to the connection between the valve body module and the actuation module, thus affecting the stability and sealing of the valve operation.

[0003] The above content is only used to assist in understanding the technical solution of the utility model and does not represent an admission that the above content is prior art. Utility Model Content

[0004] In view of the above problems, this utility model proposes a knife gate valve, which aims to solve the technical problem of loosening or damage to the connection between the valve body module and the drive module caused by excessive force applied by the drive module.

[0005] To achieve the above objectives, the knife gate valve proposed in this utility model includes a valve body module, a valve stem, a connecting component, and a drive module; wherein,

[0006] The valve body module includes a gate and a valve body extending along a first direction; the valve body is provided with an installation cavity and a flow channel extending along a second direction, the flow channel communicating with the installation cavity; the gate is slidably disposed in the installation cavity along the first direction; the first direction intersects the second direction;

[0007] One end of the valve stem is fixedly connected to the gate, and the other end extends out of the valve body and is fixedly connected to the drive module;

[0008] The connector is located between the valve body module and the drive module; the connector includes a main body and a connecting part; the main body is fixedly connected to the valve body.

[0009] The drive module includes a mounting shell with an opening at one end and a drive component connected to the valve stem and placed in the mounting shell; the mounting shell is fixedly connected to the connecting part; the drive component drives the valve stem to reciprocate so that the gate switches between a closed position that isolates the flow channel and an open position that opens the flow channel.

[0010] Furthermore, the connector has a clearance hole that passes through the main body and the connector, and the valve stem is adapted to pass through the clearance hole to be fixedly connected to the valve stem.

[0011] Furthermore, the main body is detachably connected to the valve body; and / or, the connecting part is detachably connected to the mounting housing.

[0012] Furthermore, the knife gate valve includes a first locking member, which is fixedly connected to the main body and the valve body along the first direction.

[0013] Furthermore, the main body includes a first plate and two second plates. The first plate abuts against and / or is connected to the end face of the valve body in the first direction via a connector. The first plate is connected to a second plate on each side in the second direction. The valve body is sandwiched between the two second plates in the second direction.

[0014] And / or,

[0015] The knife gate valve further includes a second locking member, which connects the two second plates and the valve body along the second direction.

[0016] In one embodiment, the valve body includes a body and a flange; the flange is connected to the end face of the body facing the mounting housing along a first direction, and the flange protrudes from the body in a second direction.

[0017] In one embodiment, the connector is threadedly connected to the mounting housing.

[0018] In one embodiment, the gate is welded to or threaded to the valve stem;

[0019] Alternatively, the knife gate valve may further include a first fixing member and a second fixing member, the gate plate being inserted into the valve stem and the valve stem and the gate plate being respectively provided with a first through hole and a second through hole, the first fixing member being inserted through the first through hole and the second through hole and connected to the second fixing member.

[0020] Furthermore, the main body includes a plate and a first cylindrical body; the plate is provided with the clearance hole, and the first cylindrical body is connected to the edge of the clearance hole around it;

[0021] The connecting part includes a second cylindrical body that surrounds and connects to the edge of the clearance hole, and the first cylindrical body and the second cylindrical body are respectively disposed on both sides of the plate in a first direction;

[0022] The first cylinder and the second cylinder are respectively inserted into the valve body and the mounting shell, and the first locking member is fixedly connected to the plate and the mounting shell along the first direction.

[0023] In one embodiment, the flow channel is located in the central region of the valve body in a first direction; the knife gate valve further includes a first valve seat, a first elastic element, a plurality of second elastic elements, a sealing element, and a second valve seat;

[0024] The second valve seat is located at one of the outlets of the flow channel and on the outside of the valve body, and the sealing element is located between the valve body and the second valve seat;

[0025] The first valve seat is placed inside the mounting cavity and has a clearance hole corresponding to the flow channel; the gate plate is provided with a through hole, the through hole connecting the flow channel and the clearance hole; the gate plate is placed between the first valve seat and the second valve seat;

[0026] The first elastic element and a plurality of second elastic elements are disposed between the inner wall surfaces of the first valve seat and the valve body; wherein, the plurality of second elastic elements are arranged at intervals around the clearance hole; and the first elastic element is disposed at the end of the first valve seat away from the drive module.

[0027] This utility model uses the main body and connecting part of the connector to be fixedly connected to the valve body and the mounting shell respectively, which enhances the connection stability of the valve body and the mounting shell and avoids the valve body and the mounting shell from becoming loose or damaged due to excessive driving force of the driving component, which in turn affects the connection stability and movement stability of the valve stem and the gate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This shows a schematic diagram of the structure of the first embodiment of the knife gate valve of this utility model from a first perspective;

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of a knife-type gate valve from a second perspective;

[0031] Figure 3 for Figure 1 A schematic diagram of the middle connector from a third-person perspective;

[0032] Figure 4 for Figure 1 A schematic diagram of the fourth-view structure of the connecting component;

[0033] Figure 5 for Figure 1 A cross-sectional view of a knife-type gate valve from a certain perspective;

[0034] Figure 6 This is a schematic diagram of the second embodiment of the knife gate valve of this utility model from a fifth perspective;

[0035] Figure 7 for Figure 6 A schematic diagram of the structure of a knife-type gate valve from a sixth-angle perspective;

[0036] Figure 8 for Figure 6 A cross-sectional view of a knife-type gate valve from a certain perspective;

[0037] Figure 9 for Figure 8 Enlarged view of point A in the middle;

[0038] Figure 10 for Figure 6 A schematic diagram of the middle connector from a seventh-angle perspective;

[0039] Figure 11 for Figure 6 A schematic diagram of the middle connector from an eighth-person perspective;

[0040] Figure 12 This is a structural schematic diagram of the third embodiment of the present invention from a ninth perspective;

[0041] Figure 13 for Figure 12 A schematic diagram of the structure of a knife-type gate valve from a certain perspective;

[0042] Figure 14 for Figure 12 A schematic diagram of the middle connector from a tenth-angle perspective;

[0043] Figure 15 for Figure 12 A schematic diagram of the middle connector from the eleventh perspective;

[0044] Figure 16 This is a cross-sectional view of the fourth embodiment of the knife gate valve of this utility model from a certain perspective;

[0045] Figure 17 for Figure 16 A cross-sectional view of a knife-type gate valve from a certain perspective;

[0046] Figure 18 This is a cross-sectional view of the fifth embodiment of the knife gate valve of this utility model from a certain perspective;

[0047] Figure 19 for Figure 18 A cross-sectional view of a knife-shaped gate valve from a certain perspective.

[0048] Explanation of icon numbers:

[0049] label name label name label name 100 Knife gate valve 31 Main body 50 First locking component 10 Valve body module 311 First plate 60 Second locking component 11 gate 312 Second plate 70 First fastener 12 Valve body 313 sheet metal 80 Second fastener 121 Mounting cavity 314 First cylinder 91 First valve seat 122 flow channel 32 Connection part 92 First elastic element 123 Ontology 321 Second cylinder 93 Second elastic element 124 flange 33 clearance hole 94 Seals 20 valve stem 40 driver module 95 Second valve seat 30 connector 41 Mounting Case 96 protrusion

[0050] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0052] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0053] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies both A and B.

[0054] This utility model proposes a knife-shaped gate valve.

[0055] In this embodiment of the utility model, please refer to Figures 1 to 19 A knife gate valve 100, characterized in that it comprises a valve body module 10, a valve stem 12, a connector 30, and a drive module 40; wherein,

[0056] The valve body module 10 includes a gate 11 and a valve body 12 extending along a first direction; the valve body 12 is provided with an installation cavity 121 and a flow channel 122 extending along a second direction, the flow channel 122 communicating with the installation cavity 121; the gate 11 is slidably disposed in the installation cavity 121 along the first direction; the first direction intersects with the second direction;

[0057] One end of the valve stem 12 is fixedly connected to the gate 11, and the other end extends out of the valve body 12 and is fixedly connected to the drive module 40;

[0058] The connector 30 is located between the valve body module 10 and the drive module 40; the connector 30 includes a main body part 31 and a connecting part 32; the main body part 31 is fixedly connected to the valve body 12.

[0059] The drive module 40 includes a mounting shell 41 with an opening at one end and a drive member connected to the valve stem 12 and placed in the mounting shell 41; the mounting shell 41 is fixedly connected to the connecting part 32; the drive member drives the valve stem 12 to reciprocate so that the gate 11 switches between the closed position that isolates the flow channel 122 and the open position that opens the flow channel 122.

[0060] In this embodiment, the valve body module 10 is the main part of fluid control, including a gate 11 and a valve body 12. The movement of the gate 11 opens and closes the fluid passage. The valve body 12 accommodates and guides fluid flow, ensuring the passage's sealing and stability. A flow passage 122 on the valve body 12 allows fluid to pass through; the mounting cavity 121 within the valve body 12 primarily provides sliding space for the gate 11. The mounting cavity 121 communicates with the flow passage 122, ensuring that the movement of the gate 11 effectively changes the opening and closing state of the fluid passage. The valve body 12 and the gate 11 can be made of corrosion-resistant, high-strength metal materials to ensure they are not easily corroded or damaged, such as stainless steel. The material used for the valve body 12 and the gate is not limited here.

[0061] The valve stem 20 is used for transmission. It is connected to the drive component of the drive module 40 and can effectively transmit the driving force to the gate 11 to achieve its precise movement within the valve body 12.

[0062] The drive module 40 is connected to the valve stem 20 and promotes the reciprocating motion of the valve stem 20 through the action of the drive component, thereby realizing the opening and closing of the gate 11. The drive module 40 can be electric, pneumatic or hydraulic, and there is no limitation here.

[0063] The connector 30 provides a stable connection between the valve body module 10 and the drive module 40. The body part 31 and the connector 32 can effectively disperse the excessive force applied by the drive module 40, which helps to prevent the connection from becoming loose or damaged, and ensures that the gate 11 in the valve body 12 and the valve stem 20 in the mounting housing 41 move stably along the axial direction of the valve stem, thereby improving the stability and service life of the valve.

[0064] The connector 30 includes a main body 31 and a connecting part 32, which are respectively connected to the valve body 12 and the mounting housing 41. Fixed connections include, but are not limited to, bolt connections, riveting, etc.

[0065] This utility model uses the main body part 31 and the connecting part 32 on the connector 30 to be fixedly connected to the valve body 12 and the mounting shell 41 respectively, thereby enhancing the connection stability of the valve body 12 and the mounting shell 41 and preventing the connection between the valve body 12 and the mounting shell 41 from becoming loose or damaged due to excessive driving force of the driving component, which would then affect the connection stability and movement stability of the valve stem 20 and the gate 11.

[0066] Furthermore, the connector 30 has a clearance hole 33 that passes through the main body 31 and the connecting part 32, and the valve stem 20 is adapted to pass through the clearance hole 33 to be fixedly connected with the valve stem 12.

[0067] In this embodiment, the clearance hole 33 provides a precise channel for the valve stem 20, ensuring the axial stability of the valve stem 20 and reducing possible swaying or offset. This ensures the precise positioning of the valve stem 20 during reciprocating motion, thereby improving the movement accuracy of the gate 11 and further ensuring the precision of fluid control.

[0068] Furthermore, the main body 31 is detachably connected to the valve body 12. This detachable connection allows for quick disassembly of the main body 31 for inspection and maintenance without removing the entire valve body 12. This helps reduce downtime and improves production efficiency. Detachable connections include, but are not limited to, bolted connections, snap-fit ​​connections, etc.

[0069] In one embodiment, the connector 32 is detachably connected to the mounting housing 41. This detachable connection allows for quick inspection and maintenance of the connector 32 without removing the entire drive module 40. This helps reduce downtime and improves production efficiency. Detachable connections include, but are not limited to, bolted connections, snap-fit ​​connections, etc.

[0070] Furthermore, the knife gate valve 100 includes a first locking member 50, which is fixedly connected to the main body 31 and the valve body 12 along a first direction.

[0071] In this embodiment, the first locking member 50 provides additional structural support, thereby making the connection between the main body 31 and the valve body 12 in the first direction tighter and more stable. This connection method reduces the possibility of structural loosening due to vibration or operating force. Under fluid pressure, the first locking member 50 can effectively resist possible displacement or deformation, improving the stability and reliability of the valve. Furthermore, because the first locking member 50 improves structural stability, the sealing effect of the valve during opening and closing is further optimized, ensuring precise fluid control during operation.

[0072] Furthermore, the main body 31 abuts against the valve body 12 in the first direction. This reduces loosening or misalignment caused by fluid impact and mechanical vibration, improving the overall structural stability of the device.

[0073] At the same time, it can effectively enhance the sealing between the valve body 12 and the main body 31, reducing the possibility of leakage. In addition, the abutment can serve as a positioning reference for the installation of the main body 31, simplifying the alignment process, improving installation efficiency and accuracy, and reducing human error.

[0074] Furthermore, referring to Figures 12 to 15 The main body 31 includes a first plate 311 and two second plates 312. The first plate abuts against and / or is connected to the end face of the valve body in a first direction through a connector. The first plate 311 is connected to a second plate 312 on each side in a second direction. The valve body 12 is sandwiched between the two second plates 312 in the second direction.

[0075] In this embodiment, the valve body 12 is sandwiched between the two second plates 312, which is equivalent to the two second plates 312 forming a clamping structure, which can effectively reduce displacement or loosening caused by vibration or external force, thereby improving the structural strength and stability of the entire device.

[0076] In some embodiments, reference is made to Figure 12 The outer surface of the valve body 12 is provided with a protrusion 96, which is located between two second plates 312 that are spaced apart in the lateral direction (the lateral direction intersects with the first direction and the second direction in pairs), and serves to limit the two second plates 312. In some embodiments, the end face of the protrusion 96 extending in the lateral direction abuts against the first plate 311.

[0077] Furthermore, referring to Figure 12 The knife gate valve 100 also includes a second locking member 60, which connects the second plate 312 and the valve body 12 along a second direction. The second locking member 60 enhances the connection stability between the connector 30 and the valve body 12 in the second direction; in other words, it enhances the stability of the connection between the valve body 12 and the mounting housing 41.

[0078] The first locking element 50 and the second locking element 60 enhance the stability of the connection between the connecting element 30 and the valve body 12 (valve body 12 and mounting housing 41) in different directions, reducing the risk of loosening between the valve body 12 and the connecting element 30 due to vibration and impact. This stabilizes the movement path of the valve stem 20 and prevents the movement path and accuracy of the valve stem 20 and gate 11 from being affected by structural instability. Furthermore, due to the multi-directional locking effect, the components of the valve body 12 can be evenly stressed during operation, thereby reducing wear and material fatigue and extending the overall service life of the knife gate valve 100.

[0079] The first locking element 50 and the second locking element 60 may be made of high-strength, corrosion-resistant materials such as stainless steel or high-strength alloys; the specific materials are not limited here. The first locking element 50 and the second locking element 60 may be screws or bolts; there are no limitations on this.

[0080] In one embodiment, the valve body 12 includes a body 123 and a flange 124; the flange 124 is connected to the end face of the body 123 facing the mounting housing 41 in a first direction, and the flange 124 protrudes from the body 123 in a second direction; the first locking member 50 is fixedly connected to the flange 124 and the body 31 in the first direction.

[0081] In this embodiment, flange 124 provides additional connection area between valve body 12 and main body 31. The first locking member 50 is secured by flange 124, enhancing the stability of the connection and effectively resisting vibration and external forces. The lateral protrusion of flange 124 from body 123 helps to distribute stress from fluid pressure and mechanical loads more evenly, thereby reducing the risk of structural damage caused by localized stress concentration. The addition of flange 124 not only strengthens the structure but also increases the sealing contact surface, contributing to improved overall valve sealing performance and reducing leakage risk.

[0082] In one embodiment, the connector 30 is threadedly connected to the mounting housing 41. In this embodiment, the threaded connection provides a stronger mechanical bond, enhancing the structural stability between the connector 30 and the mounting housing 41. This connection method reduces loosening or displacement caused by external forces.

[0083] In one embodiment, the gate 11 is welded to the valve stem 20. Welding the gate 11 to the valve stem 20 provides a continuous contact surface and higher connection strength. Welding creates a unified structure, effectively preventing detachment due to external forces such as vibration or impact. In some embodiments, the gate 11 is first installed into the valve body 12, then welded to the valve stem 20. After welding, the valve stem 20 is then installed into the mounting housing 41.

[0084] In one embodiment, the gate 11 is threaded to the valve stem 20. The threaded connection provides a strong mechanical engagement force, and the tightness can be adjusted as needed. This method is not only robust but also facilitates disassembly and maintenance.

[0085] In one embodiment, the knife gate valve 100 further includes a first fixing member 70 and a second fixing member 80. The gate plate 11 is inserted into the valve stem 20, and the valve stem 20 and the gate plate 11 are respectively provided with a first through hole and a second through hole. The first fixing member 70 passes through the first through hole and the second through hole and is connected to the second fixing member 80.

[0086] In this embodiment, the design of the first fixing member 70 and the second fixing member 80 ensures a reliable connection between the valve stem 20 and the gate 11, preventing loosening and detachment due to vibration or pressure fluctuations during operation. The first fixing member 70 and the second fixing member 80 can be a combination of bolts and nuts, a combination of pins and elastic retaining rings, or a combination of pins and locking devices.

[0087] In one embodiment, the main body 31 includes a plate 313 and a first cylindrical body 314; the plate 313 is provided with a clearance hole 33, and the first cylindrical body 314 is connected around the edge of the clearance hole 33; the connecting part 32 includes a second cylindrical body 321 connected around the edge of the clearance hole 33, the first cylindrical body 314 and the second cylindrical body 321 are respectively provided on both sides of the plate 313 in a first direction; the first cylindrical body 314 and the second cylindrical body 321 are respectively inserted into the valve body 12 and the mounting shell 41, and the first locking member 50 is fixedly connected to the plate 313 and the mounting shell 41 in the first direction.

[0088] In this embodiment, the first cylinder 314 and the second cylinder 321 are located on both sides of the plate 313. This symmetrical design helps to distribute stress during connection, ensuring the durability and reliability of the connecting parts 32 during use. The first cylinder 314 and the second cylinder 321 are respectively inserted into the valve body 12 and the mounting shell 41. This design not only simplifies the installation process but also provides additional support and positioning, making installation more convenient and accurate. The first locking member 50 is fixedly connected to the plate 313 in the first direction, ensuring that the components do not loosen due to vibration or external forces during use, thereby improving the durability of the entire device.

[0089] It is worth noting that in this embodiment, the wall of the clearance hole 33 and the inner wall surfaces of the first cylinder 314 and the second cylinder 321 are all adapted to the valve stem 20. This is equivalent to increasing the contact area between the connector 30 and the valve stem 20, further stabilizing the movement path of the valve stem 20, and avoiding deviation of the movement path of the valve stem 20.

[0090] In one embodiment, the flow channel 122 is located in the middle region of the valve body 12 in the first direction; the knife gate valve 100 further includes a first valve seat 91, a first elastic element 92, a plurality of second elastic elements 93, a sealing element 94, and a second valve seat 95; the second valve seat 95 is located at one outlet of the flow channel 122 and is located on the outside of the valve body 12, and the sealing element is located between the valve body 12 and the second valve seat 95; the first valve seat 91 is placed in the mounting cavity 121 and has a clearance hole corresponding to the flow channel 122; the gate plate 11 is provided with a through hole, which connects the flow channel 122 and the clearance hole; the gate plate 11 is located between the first valve seat 91 and the second valve seat 95; the first elastic element 92 and the plurality of second elastic elements 93 are both located between the first valve seat 91 and the inner wall surface of the valve body 12; wherein, the plurality of second elastic elements 93 are spaced around the clearance hole; the first elastic element 92 is located at the end of the first valve seat 91 away from the drive module 40.

[0091] In this embodiment, the seal 94 is located between the valve body 12 and the second valve seat 95, effectively preventing fluid leakage and ensuring that the valve maintains a good sealing condition under various pressure environments. The first elastic element 92 and the second elastic element 93 enhance the clamping effect of the seal 94 by providing pre-tightening force, thereby improving the overall sealing performance. At the same time, the first and second elastic elements 93 provide a buffering function in absorbing vibration and shock, reducing the direct damage of external forces to the valve body 12 and internal components, and extending the service life of the knife gate valve 100.

[0092] The second valve seat 95 located at the outlet of the flow channel 122 can optimize the fluid flow path, reduce flow resistance and turbulence, and improve flow efficiency. This design can significantly reduce energy consumption, especially in the case of high-velocity fluids.

[0093] When the gate 11 switches between the closed and open positions, the cooperation between the first valve seat 91 and the valve body 12, the first elastic element 92, and the second elastic element 93 limits the movement path of the gate 11 and prevents the gate 11 from deviating during movement. When the gate 11 is in the closed or open position, the cooperation between the first valve seat 91 and the valve body 12, the first elastic element 92, and the second elastic element 93 during movement keeps the gate 11 in a state of stopping the sealing element 94, so as to maintain the sealing stability of the knife gate valve 100.

[0094] In this embodiment, the movement path of the gate 11 is relatively long. The arrangement of the first elastic member 92 and the second elastic member 93 can ensure that the gate 11 is subjected to uniform force and prevent the gate 11 from deforming due to uneven force.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A knife gate valve, characterized in that, It includes the valve body module, valve stem, connectors, and drive module; among which, The valve body module includes a gate and a valve body extending along a first direction; the valve body is provided with an installation cavity and a flow channel extending along a second direction, the flow channel communicating with the installation cavity; the gate is slidably disposed in the installation cavity along the first direction; the first direction intersects the second direction; One end of the valve stem is fixedly connected to the gate, and the other end extends out of the valve body and is fixedly connected to the drive module; The connector is located between the valve body module and the drive module; the connector includes a main body and a connecting part; the main body is fixedly connected to the valve body. The drive module includes a mounting shell with an opening at one end and a drive component connected to the valve stem and placed in the mounting shell; the mounting shell is fixedly connected to the connecting part; the drive component drives the valve stem to reciprocate so that the gate switches between a closed position that isolates the flow channel and an open position that opens the flow channel.

2. The knife gate valve as described in claim 1, characterized in that, The connector has a clearance hole that passes through the main body and the connector, and the valve stem is adapted to pass through the clearance hole to be fixedly connected to the valve stem.

3. The knife gate valve as described in claim 2, characterized in that, The main body is detachably connected to the valve body; and / or, the connecting part is detachably connected to the mounting housing.

4. The knife gate valve as described in claim 3, characterized in that, The knife gate valve includes a first locking member, which is fixedly connected to the main body and the valve body along the first direction.

5. The knife gate valve as described in claim 4, characterized in that, The main body includes a first plate and two second plates. The first plate abuts against and / or is connected to the end face of the valve body in the first direction via a connector. The first plate is connected to a second plate on each side in the second direction. The valve body is sandwiched between the two second plates in the second direction. And / or, The knife gate valve further includes a second locking member, which connects the two second plates and the valve body along the second direction.

6. The knife gate valve according to any one of claims 1-5, characterized in that, The valve body includes a body and a flange; the flange is connected to the end face of the body facing the mounting housing along the first direction, and the flange protrudes from the body in the second direction.

7. The knife gate valve as described in any one of claims 1-5, characterized in that, The connector is threadedly connected to the mounting shell.

8. The knife gate valve according to any one of claims 1-5, characterized in that, The gate is welded to or threadedly connected to the valve stem; Alternatively, the knife gate valve may further include a first fixing member and a second fixing member, the gate plate being inserted into the valve stem and the valve stem and the gate plate being respectively provided with a first through hole and a second through hole, the first fixing member being inserted through the first through hole and the second through hole and connected to the second fixing member.

9. The knife gate valve as described in claim 4, characterized in that, The main body includes a plate and a first cylindrical body; the plate is provided with the clearance hole, and the first cylindrical body is connected to the edge of the clearance hole around it; The connecting part includes a second cylindrical body that surrounds and connects to the edge of the clearance hole, and the first cylindrical body and the second cylindrical body are respectively disposed on both sides of the plate in a first direction; The first cylinder and the second cylinder are respectively inserted into the valve body and the mounting shell, and the first locking member is fixedly connected to the plate and the mounting shell along the first direction.

10. The knife gate valve as described in claim 1, characterized in that, The flow channel is located in the middle region of the valve body in the first direction; the knife gate valve also includes a first valve seat, a first elastic element, a plurality of second elastic elements, a sealing element, and a second valve seat; The second valve seat is located at one of the outlets of the flow channel and on the outside of the valve body, and the sealing element is located between the valve body and the second valve seat; The first valve seat is placed inside the mounting cavity and has a clearance hole corresponding to the flow channel; the gate plate is provided with a through hole, the through hole connecting the flow channel and the clearance hole; the gate plate is placed between the first valve seat and the second valve seat; The first elastic element and a plurality of second elastic elements are disposed between the inner wall surfaces of the first valve seat and the valve body; wherein, the plurality of second elastic elements are arranged at intervals around the clearance hole; and the first elastic element is disposed at the end of the first valve seat away from the drive module.

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