Gate valve

Abstract

The utility model discloses a gate valve. The gate valve comprises a valve body, a partition plate and a valve plate, the partition plate and the valve plate are fixed in the valve body, a main valve and an auxiliary valve are defined by the valve body and the partition plate, a discharging port is formed in the main valve, the valve plate can be installed on the valve body in a penetrating mode to open and close the discharging port, the gate valve further comprises a limiting structure, a plurality of idler wheels and a driving mechanism, and the valve plate is movably arranged in the limiting structure; part of the rollers are installed on the main valve, the other part of the rollers are installed on the auxiliary valve, and the rollers are used for supporting the valve plate. And the driving mechanism is connected with the valve plate and used for driving the valve plate to move on the roller, so that the smoothness of the valve plate moving relative to the valve plate is improved, and the stability and reliability of the gate valve are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve application, in particular to a plug-in valve. Background Art

[0002] Large tank silos are an important symbol of industrial scale. The gate valve is used for the discharge switch of the silo. The valve plate and the valve body can slide relative to each other to open and close the discharge port on the valve body. The sliding friction between the valve plate and the valve body is positively correlated with the positive pressure between the valve plate and the valve body. The more materials in the silo, the greater the load on the valve plate, the greater the sliding friction between the valve plate and the valve body, and the valve plate needs a greater driving force to open the discharge port, which increases the difficulty of material discharge. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a plug valve for improving the smoothness of the movement of the valve plate relative to the valve plate and improving the stability of the movement of the valve plate.

[0004] The gate valve includes a valve body, a partition fixed in the valve body and a valve plate. The valve body and the partition define a main valve and a secondary valve. The main valve has a discharge port, and the valve plate can be inserted and installed in the valve body to open and close the discharge port. The gate valve also includes a limiting structure, a plurality of rollers and a driving mechanism. The valve plate is movably arranged in the limiting structure; part of the rollers are installed on the main valve, and the other part of the rollers are installed on the secondary valve. The rollers are used to support the valve plate; the driving mechanism is connected to the valve plate and is used to drive the valve plate to move on the rollers.

[0005] Preferably, the number of rollers installed in the main valve is greater than the number of rollers installed in the auxiliary valve.

[0006] Preferably, the limiting structure includes a valve body through groove opened on the partition.

[0007] Preferably, the spindle of the roller is located below the valve body through groove, so that the abutment point between the valve plate and the roller and the groove wall of the valve body through groove are located on the same horizontal plane.

[0008] Preferably, the limiting structure further comprises a limiting rib fixed on the main valve, and the minimum spacing distance between the limiting rib and the roller and the maximum thickness of the valve plate meet one of the following conditions: Condition A1: the minimum spacing distance between the limiting rib and the roller is greater than the maximum thickness of the valve plate;

[0009] Condition A2: The minimum spacing distance between the limiting rib and the roller is equal to the maximum thickness of the valve plate.

[0010] Preferably, the driving mechanism comprises a transmission member, the transmission member is fixed on the valve plate, and the output end of the driving mechanism is hinged to the transmission member.

[0011] Preferably, a guide groove is provided on the auxiliary valve, the transmission member is movably installed in the guide groove, the transmission member is fixed on the bottom surface of the valve plate, and the guide groove is located below the roller; or, the transmission member is fixed on the top surface of the valve plate, the guide groove is located above the roller, and the valve plate is spaced between the guide groove and the roller.

[0012] Preferably, the side edge of the valve plate has a cutting component, and the cutting component is configured as a sharp-angle structure.

[0013] Preferably, a sealing rib arranged around the discharge port is fixed on the main valve, the sealing rib is located above the roller, and the spacing distance between the sealing rib and the roller is greater than or equal to the thickness of the valve plate.

[0014] Preferably, the roller comprises a spindle, a shoulder of which abuts against the valve body.

[0015] It can be seen from the technical solution that the embodiment provided by the utility model has the following advantages:

[0016] According to the gate valve of the embodiment of the utility model, the driving mechanism drives the valve plate to move on the roller, and the limiting structure limits the movable range of the valve plate to avoid the valve plate and the valve body from being out of coordination, thereby improving the stability and reliability of the function operation of the gate valve; the driving mechanism can reduce manual input, improve the degree of automation of material discharging, and reduce labor intensity; by providing a roller structure, the friction resistance between the valve plate and the valve body is converted into rolling friction, thereby reducing the wear of the valve plate. At the same time, the roller can reduce the probability of material jamming, which is beneficial to avoid the valve plate from being jammed and improving the smoothness of the valve plate movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is an overall schematic diagram of a gate valve according to an embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of the assembly of the valve body and the guide structure according to an embodiment of the utility model;

[0020] Figure 3 is a cross-sectional view of a gate valve according to an embodiment of the utility model;

[0021] Figure 4 is a side cross-sectional view of a gate valve according to an embodiment of the utility model;

[0022] Figure 5 is based on Figure 4 Enlarged view at C;

[0023] Figure 6 It is a schematic diagram of the structure of the roller according to the utility model embodiment;

[0024] Figure 7 It is a partial structural schematic diagram of a gate valve according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Gate valve 100;

[0027] The first roller assembly 101, the second roller assembly 102, the roller 11, the spindle 111, the shoulder 1111, the rotating body 112, the annular boss 1121, the spacer assembly 113, the elastic member 1131, the spacer 1132, the gasket 1133, and the fastener 114;

[0028] Valve plate 2, cutting component 21;

[0029] Driving mechanism 3, driver 31, transmission member 32, driver mounting seat 33, hydraulic actuator 34;

[0030] Valve body 4, main valve 41, discharge port 411, auxiliary valve 42, guide groove 421, partition plate 43, reinforcing channel steel 44, roller mounting hole 45, driver mounting channel steel 46;

[0031] Limiting structure 6, limiting rib 61, valve body through groove 62;

[0032] Bolt 7;

[0033] Discharge funnel 8;

[0034] Sealing rib 9. DETAILED DESCRIPTION

[0035] Reference below Figure 1-Figure 6 A gate valve 100 according to an embodiment of the present invention is described.

[0036] like Figure 1 and Figure 4As shown, the gate valve 100 according to the embodiment of the utility model comprises a valve body 4, a partition 43 fixed in the valve body 4, and a valve plate 2. The partition 43 is fixed in the valve body 4, and divides the valve body 4 into a main valve 41 and an auxiliary valve 42. The main valve 41 has a discharge port 411, and the valve plate 2 can be inserted and installed in the valve body 4 to open and close the discharge port 411. The valve plate 2 is inserted in the valve body 4, and when the valve plate 2 is in the main valve 41, the discharge port 411 can be closed. The valve plate 2 withdraws from the main valve 41 to the auxiliary valve 42, and the discharge port 411 on the main valve 41 can be opened; when the valve plate 2 is between the main valve 41 and the auxiliary valve 42, the valve plate 2 partially closes the discharge port 411.

[0037] The gate valve 100 also includes a limiting structure 6, multiple rollers 11 and a driving mechanism 3. The valve plate 2 is movably arranged in the limiting structure 6; some rollers 11 are installed on the main valve 41, and other rollers 11 are installed on the auxiliary valve 42. The rollers 11 can support the valve plate 2; the driving mechanism 3 is connected to the valve plate 2 and is used to drive the valve plate 2 to move on the rollers 11.

[0038] In this embodiment, the driving mechanism 3 drives the valve plate 2 to move on the roller 11, and the limiting structure 6 limits the movable range of the valve plate 2 to avoid the valve plate 2 and the valve body 4 from being out of coordination, thereby improving the stability and reliability of the functional operation of the plug valve 100; the driving mechanism 3 can reduce manual input, improve the degree of automation of material discharging, and reduce labor intensity; by setting the roller structure, the friction resistance between the valve plate 2 and the valve body 4 is converted into rolling friction, thereby reducing the wear of the valve plate 2. At the same time, the roller 11 can reduce the probability of material jamming, which is beneficial to avoid the valve plate 2 from being jammed and improve the smoothness of the movement of the valve plate 2.

[0039] like Figure 4 As shown, in some embodiments, the number of rollers installed in the main valve 41 is greater than the number of rollers installed in the auxiliary valve 42. The rollers 11 provided in the main valve 41 support the valve plate 2 and the material on the valve plate 2. More rollers 11 provided in the main valve 41 can improve the supporting capacity; when the valve plate 2 withdraws from the main valve 41 to the auxiliary valve 42, fewer rollers 11 are provided in the auxiliary valve 42 to support the valve plate 2, which can improve the utilization rate of the rollers 11 and simplify the structure of the plug valve 100. It should be further explained that when the valve plate 2 is located in the auxiliary valve 42, the rollers 11 in the auxiliary valve 42 support the valve plate 2, and the friction resistance between the valve plate 2 and the auxiliary valve 42 is converted into rolling friction, and the starting driving force for closing the discharge port 411 is reduced.

[0040] like Figure 2-Figure 4As shown, in some embodiments, the limiting structure 6 includes a valve body through groove 62 opened on the partition 43, and the valve plate 2 can be inserted back and forth between the main valve 41 and the auxiliary valve 42 through the valve body through groove 62. The groove wall of the valve body through groove 62 can limit the up and down movement of the valve plate 2, so that the valve body through groove 62 can limit the valve plate 2, thereby improving the stability and reliability of the movement. The groove wall of the valve body through groove 62 can also push the material on the valve plate 2 to the discharge port 411 to avoid leakage and waste of material.

[0041] like Figure 2-Figure 4 As shown, in some embodiments, the spindle 111 of the roller 11 is located below the valve body through groove 62, and the abutment between the valve plate 2 and the roller 11 and the groove wall of the valve body through groove 62 are located on the same horizontal plane. The valve plate 2 is inserted back and forth between the main valve 41 and the auxiliary valve 42 through the valve body through groove 62, and the roller spindle of the main valve 41 and the roller spindle of the auxiliary valve 42 are both arranged below the valve body through groove 62. The valve plate 2 can move in a horizontal position, thereby improving the smoothness of the movement of the valve plate 2.

[0042] In some optional embodiments, the limiting structure 6 further includes a limiting rib 61 fixed on the main valve 41 , and the minimum spacing distance between the limiting rib 61 and the roller 11 is greater than the maximum thickness of the valve plate 2 .

[0043] like Figure 3 As shown, in some other optional embodiments, the minimum spacing distance between the limiting rib 61 and the roller 11 is equal to the maximum thickness of the valve plate 2.

[0044] The limiting rib 61 extends along the arrangement direction of the roller 11 and is welded and fixed on the main valve 41. The valve plate 2 is located between the limiting rib 61 and the roller 11. The roller 11 can be supported on the bottom surface of the valve plate 2. The limiting rib 61 can abut against the top surface of the valve plate 2. The limiting rib 61 limits the position of the top surface of the valve plate 2 to prevent the valve plate 2 from warping up, maintain the movement posture of the valve plate 2, and improve the smoothness of the movement of the valve plate 2.

[0045] like Figure 1 As shown, in some embodiments, the output end of the driving mechanism 3 is hinged to the valve plate 2, and the output end of the driving mechanism 3 is the output end of the driving mechanism power. The output end is hinged to the valve plate 2, so that the output position of the output end can be adjusted to avoid the valve plate 2 from getting stuck during the driving process, improve the smoothness of the movement of the valve plate 2, and improve the stability and reliability of the functional operation of the gate valve 100.

[0046] like Figure 1As shown, in some embodiments, the driving mechanism 3 includes a transmission member 32, the transmission member 32 is fixed on the valve plate 2, and the output end of the driving mechanism 3 is hinged to the transmission member 32. The valve plate 2 and the output end of the driving mechanism 3 are transmitted through the transmission member 32, and the transmission member 32 is fixed on the top surface or the bottom surface of the valve plate 2. The transmission member 32 can distribute the single-point output of the output end to the top surface or the bottom surface of the valve plate 2, thereby dispersing the driving force, reducing the stress concentration on the valve plate 2, and improving the force transmission path.

[0047] like Figure 1 As shown, in an optional example, the transmission member 32 is constructed as a long plate member fixed on the top surface of the valve plate 2, and the long plate member is fixed to the top surface of the valve plate 2 by a plurality of bolts 7, and the plurality of bolts 7 are evenly spaced.

[0048] In an optional example, the transmission member 32 and the valve plate 2 are welded at multiple points.

[0049] Combination Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, a guide groove 421 is provided on the auxiliary valve 42, and the transmission member 32 is movably installed in the guide groove 421. The transmission member 32 drives the valve plate 2 to move on the roller 11, and the guide groove 421 limits the posture of the valve plate 2 during the movement by limiting the posture of the transmission member 32 during the movement. When the valve plate 2 moves between the main valve 41 and the auxiliary valve 42, the material carried on the valve plate 2 is uneven, and the weight of the valve plate 2 in the auxiliary valve 42 is small. The valve plate 2 and the transmission member 32 have a tendency to move upward, and the upper end of the transmission member 32 can abut against the upper groove wall of the guide groove 421 to maintain the active posture of the valve plate 2, prevent the valve plate 2 from being separated from the valve body 4, improve the smoothness of the movement of the valve plate 2, and improve the stability and reliability of the function of the gate valve 100.

[0050] like Figure 1 and Figure 4 As shown, the roller 11 in the main valve 41 forms a first roller group 101, and the roller 11 in the auxiliary valve 42 forms a second roller group 102. The guide groove 421 can be arranged above the second roller group 102, and the transmission member 32 is fixed on the top surface of the valve plate 2 and movably installed in the guide groove 421. There is sliding friction between the upper groove wall of the guide groove 421 and the transmission member 32. In order to improve the smoothness of the relative movement between the guide groove 421 and the transmission member 32, a third roller group can be arranged in the guide groove 421. The third roller group is installed on the auxiliary valve 42 and is located above the second roller group 102. Specifically, the third roller group converts the sliding friction between the upper groove wall and the transmission member 32 into rolling friction.

[0051] Or, if Figure 7As shown, the guide groove 421 can be arranged below the second roller group 102, and the transmission member 32 is fixed to the bottom surface of the valve plate 2 and movably installed in the guide groove 421. The upper groove wall and the lower groove wall of the guide groove 421 are in sliding friction with the transmission member 32. In order to improve the smoothness of the relative movement between the guide groove 421 and the transmission member 32, a fourth roller group can be arranged in the guide groove 421. The fourth roller group is installed on the auxiliary valve 42 and is located below the second roller group 102. Specifically, a part of the rollers in the fourth roller group is arranged on the upper groove wall, and another part of the rollers in the fourth roller group is arranged on the lower groove wall. Therefore, the sliding friction between the upper groove wall of the guide groove 421 and the transmission member 32 can be converted into rolling friction, and the sliding friction between the lower groove wall of the guide groove 421 and the transmission member 32 can be converted into rolling friction.

[0052] In combination with the above embodiments, Figure 1 , Figure 2 and Figure 4 As shown, the guide groove 421 is constructed as a through groove that penetrates the auxiliary valve 42, and the two ends of the transmission member 32 extend out of the through groove to connect the driver 31 of the driving mechanism 3. The transmission member 32 and the driver 31 are connected on the outside of the auxiliary valve 42, which is convenient for repairing and replacing the driver 31. The main valve 41 is connected with a driver mounting channel steel 46, which is hinged to the driver 31 through the driver mounting seat 33, and the output end of the driver 31 is hinged to the transmission member 32, and the transmission member 32 can adjust the position to prevent the valve plate 2 from getting stuck.

[0053] like Figure 4 and Figure 5 As shown, in some embodiments, the side of the valve plate 2 has a material cutting component 21, and the material cutting component 21 is configured as a sharp angle structure. During the activity, the distance between the side of the valve plate 2 and the valve body 4 changes. When the distance between the side of the valve plate 2 and the valve body 4 gradually decreases, there may be material stuck between the valve plate 2 and the valve body 4. By forming a sharp angle on the side of the valve plate 2, the material can be cut, thereby cutting off and separating the material above the valve plate 2 and the material below the valve plate 2, reducing the probability of material stuck between the valve plate 2 and the valve body 4, and improving the stability and reliability of the function of the gate valve 100.

[0054] For example, when the valve plate 2 is inserted back and forth in the main valve 41 , one side of the valve plate 2 in the insertion direction is fixedly connected to the transmission member 32 , and the other side of the valve plate 2 in the insertion direction has a cutting component 21 .

[0055] like Figure 2-Figure 5As shown, in some embodiments, a sealing rib 9 arranged around the discharge port 411 is fixed on the main valve 41, and the sealing rib 9 is located above the roller 11, and the spacing distance between the sealing rib 9 and the roller 11 is greater than or equal to the thickness of the valve plate 2. When the valve plate 2 closes the discharge port 411, it may not be closed in place. By fixing the sealing rib 9 on the main valve 41, the sealing rib 9 is arranged above the valve plate 2, and the sealing rib 9 can seal the gap between the valve plate 2 and the main valve 41, which is conducive to preventing the material from leaking from the discharge port 411 through the gap between the valve plate 2 and the valve body 4, thereby improving the sealing effect of the plug valve 100. At the same time, when the valve plate 2 is closed in place, the spacing distance between the sealing rib 9 and the roller 11 is greater than or equal to the thickness of the valve plate 2, and the valve plate 2 can move between the sealing rib 9 and the roller 11, and the sealing rib 9 will not interfere with the movement of the valve plate 2, thereby improving the smoothness of the movement of the valve plate 2.

[0056] It should be noted that the limiting rib 61 can cooperate with the valve plate 2 to achieve a sealing effect, preventing the material from leaking out of the discharge port 411 from between the valve plate 2 and the limiting rib 61. Therefore, the limiting rib 61 can also improve the sealing effect of the valve plate 2.

[0057] In some embodiments, the roller 11 includes a spindle 111, a shoulder 1111 of the spindle 111 abuts against the valve body 4, and the roller 11 is installed on the valve body 4. The shoulder 1111 of the spindle 111 limits the relative movement between the spindle 111 and the valve body 4, thereby improving the stress concentration of the spindle 111 and improving the stability and reliability of the roller.

[0058] like Figure 6 As shown, optionally, the roller 11 includes a spindle 111 and a rotating body 112, the spindle 111 sequentially penetrates the rotating body 112 and the valve body 4, and the shoulder 1111 of the spindle 111 abuts against the inner side of the valve body 4. The spindle 111 partially extends into the inner side of the valve body 4, and the weight of the valve body 4 and the material is transferred to the spindle 111 through the rotating body 112. When the shoulder 1111 of the spindle 111 abuts against the inner side of the valve body 4, the distance that the spindle 111 extends into the inner side of the valve body 4 can be reduced, the torque applied to the spindle 111 by the valve plate 2 and the material can be reduced, the force transmission path of the spindle 111 is optimized, the stress concentration of the spindle 111 is improved, and the stability and reliability of the structure are improved.

[0059] like Figure 6As shown, in a specific example, the roller 11 also includes a spacer assembly 113 and a fastener 114. The spacer assembly 113 is arranged between the fastener 114 and the valve body 4, and can adjust the gap between the mandrel 111 and the valve body 4, and locate the installation position of the mandrel 111. The fastener 114 fixes the mandrel 111 on the valve body 4. The spacer assembly 113 includes an elastic member 1131, a spacer 1132 and a gasket 1133. The spacer 1132 is spaced between the valve body 4 and the first fastener 114, and the gap between the valve body 4 and the first fastener 114 is adjusted to improve the installation accuracy; at the same time, it is beneficial to avoid direct contact between the valve body 4 and the first fastener 114, and improve the stability of the structure. The fastener 114 presses against the elastic member 1131, and the elastic force of the elastic member 1131 causes the gasket 1133 to press against the spacer 1132. The gasket 1133 can disperse the pressure to avoid uneven force on the mandrel 111. The rotating body 112 has an annular boss 1121 in the axial direction, the rotation center of the annular boss 1121 is the same as the rotation center of the rotating body 112, the annular surface size of the annular boss 1121 in the radial direction is smaller than the annular surface size of the rotating body 112 in the radial direction, and the annular boss 1121 is arranged at one end of the rotating body 112 close to the valve body 4, which can avoid contact friction between the rotating body 112 and the valve body 4 and improve the smoothness of the rolling of the roller 11.

[0060] According to the following Figure 1-Figure 6 A specific embodiment will be described below.

[0061] The valve body 4 is composed of a longitudinal channel steel extending in the front-to-back direction, a transverse channel steel extending in the left-to-right direction, and an actuator mounting channel steel. The valve body 4 is made of carbon steel. The transverse channel steel separates the valve body 4 into a main valve 41 and an auxiliary valve 42. The auxiliary valve is surrounded by the longitudinal channel steel, the transverse channel steel, and the reinforcing channel steel 44. The valve body 4 is relatively long in the front-to-back direction. By arranging the reinforcing channel steel 44 at the end, the structural strength of the valve body 4 can be enhanced.

[0062] Among them, the longitudinal channel steel and the transverse channel steel are both C-shaped channel steels. The C-shaped channel steel has a channel bottom and channel walls connected on both sides of the channel bottom. The rib plate structure is formed by the channel bottom and the channel wall, which can improve the structural strength of the channel steel and is beneficial to improving the structural strength and stability of the valve body and the auxiliary valve.

[0063] The driving mechanism 3 is a hydraulic driving mechanism, which includes a hydraulic actuator 34 and a driver 31 .

[0064] The longitudinal channel steel and the transverse channel steel of the valve body 4 enclose a valve cavity, and the bottom of the valve cavity is a square discharge port 411; the limiting convex rib 61 is located in the discharge port 411, and the limiting convex rib 61 is welded and fixed to the valve body 4; the actuator mounting channel steel is connected to the front side of the valve body 4 and fixes the hydraulic actuator 34; the discharge funnel 8 is located at the bottom below the discharge port 411 and is fixed to the valve body 4 by screws; the inner side surface of the longitudinal channel steel is provided with a roller mounting hole 45, and the roller mounting hole 45 can be installed with a roller 11; the main valve 41 is installed with a first roller group 101, and the first roller group includes a plurality of rollers 11 evenly spaced and arranged in a straight line; the auxiliary valve 42 is provided with a second roller group 102, and the longitudinal channel steel is installed with a plurality of roller structures, and the plurality of rollers 11 are arranged in a straight line; the bottom surface of the valve plate 2 is attached to the roller 11 and passes through the transverse through groove on the partition 43; Figure 1 As shown, the valve plate 2 moves forward to close the discharge port 40. The side edge of the front side of the valve plate 2 is set to a sharp angle, which can cut off the material when the valve plate 2 moves forward. The transmission member 32 is fixed to the rear end of the valve plate 2 with multiple screws to drive the valve plate 2 to move; the left and right ends of the transmission member 32 pass through the guide groove 421 and are connected to the output end of the driver 31; the driver mounting seat 33 is welded and fixed to the two ends of the driver mounting channel steel 46, and the driver 31 in the driving mechanism includes two hydraulic cylinders; the tail of the hydraulic cylinder is connected to the driver mounting seat 33, the output push rod of one hydraulic cylinder is connected to one end of the transmission member 32, and the output push rod of the other hydraulic cylinder is connected to the other end of the transmission member 32; the high-pressure liquid pipe connects the hydraulic cylinder and the hydraulic actuator 34.

[0065] The discharge port 411 of the gate valve 100 is a square discharge port, and the discharge port 411 of the gate valve 100 is directly opposite to the discharge port of the silo. The main valve 41 is provided with a roller mounting hole 45, and the main valve 41 is connected to the discharge port 411 at the bottom of the silo. The driving mechanism 3 pushes the transmission member 32 to drive the valve plate 2 to perform linear reciprocating motion; the bottom surface of the valve plate 2 is attached to the roller 11 for rolling motion, and its rolling friction is small, and the wear of the valve plate 2 is also smaller; the gate valve 100 is provided with a plurality of rollers 11, which can support the weight of the valve plate 2 and the material on the valve plate 2; when unloading, the material will not accumulate on the roller 11 structure; the valve plate 2 will not get stuck during movement.

[0066] Other structures and operations of the gate valve 100 according to the embodiment of the utility model are known to those skilled in the art and will not be described in detail here. In the description of the utility model, "first feature" and "second feature" may include one or more of the features. Among them, the up-down direction, left-right direction and front-back direction are based on the up-down direction, left-right direction and front-back direction shown in the figure.

Claims

1. A gate valve, comprising a valve body (4), a partition (43) fixed in the valve body (4), and a valve plate (2), wherein the valve body (4) and the partition (43) define a main valve (41) and a secondary valve (42), the main valve (41) having a discharge port (411), and the valve plate (2) can be inserted and installed in the valve body (4) to open and close the discharge port (411), characterized in that: Also includes: a limiting structure (6), wherein the valve plate (2) is movably arranged in the limiting structure (6); a plurality of rollers (11), some of the rollers (11) being mounted on the main valve (41), and other parts of the rollers (11) being mounted on the auxiliary valve (42), the rollers (11) being used to support the valve plate (2); The driving mechanism (3) is connected to the valve plate (2) and is used to drive the valve plate (2) to move on the roller (11).

2. The gate valve according to claim 1, characterized in that: The number of rollers (11) installed in the main valve (41) is greater than the number of rollers (11) installed in the auxiliary valve (42).

3. The gate valve according to claim 1, characterized in that: The limiting structure (6) comprises a valve body through groove (62) formed on the partition plate (43).

4. The gate valve according to claim 3, characterized in that: The spindle (111) of the roller (11) is located below the valve body through groove (62), so that the abutment point between the valve plate (2) and the roller (11) and the groove wall of the valve body through groove (62) are located on the same horizontal plane.

5. The gate valve according to claim 1, characterized in that: The limiting structure (6) further comprises a limiting convex rib (61) fixed on the main valve (41), wherein the minimum spacing distance between the limiting convex rib (61) and the roller (11) and the maximum thickness of the valve plate (2) satisfy one of the following conditions: Condition A1: the minimum spacing distance between the limiting rib (61) and the roller (11) is greater than the maximum thickness of the valve plate (2); Condition A2: The minimum spacing distance between the limiting rib (61) and the roller (11) is equal to the maximum thickness of the valve plate (2).

6. The gate valve according to claim 5, characterized in that: The driving mechanism (3) comprises a transmission member (32), the transmission member (32) being fixed on the bottom surface or the top surface of the valve plate (2), and the output end of the driving mechanism (3) being hingedly connected to the transmission member (32).

7. The gate valve according to claim 6, characterized in that: The auxiliary valve (42) is provided with a guide groove (421), the transmission member (32) is movably mounted in the guide groove (421), the transmission member (32) is fixed on the bottom surface of the valve plate (2), and the guide groove (421) is located below the roller (11); Alternatively, the transmission member (32) is fixed on the top surface of the valve plate (2), the guide groove (421) is located above the roller (11), and the valve plate (2) is spaced between the guide groove (421) and the roller (11).

8. The gate valve according to any one of claims 1 to 7, characterized in that: The side edge of the valve plate (2) is provided with a cutting component (21), and the cutting component (21) is configured as a sharp-angle structure.

9. The gate valve according to any one of claims 1 to 7, characterized in that: A sealing rib (9) arranged around the discharge port (411) is fixed to the main valve (41), the sealing rib (9) being located above the roller (11), and the spacing between the sealing rib (9) and the roller (11) being greater than or equal to the thickness of the valve plate (2).

10. The gate valve according to claim 1, characterized in that: The roller (11) comprises a spindle (111), and a shaft shoulder (1111) of the spindle (111) abuts against the valve body (4).

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