A gate and a gate valve

Abstract

The application relates to the technical field of valve body structures, and discloses a gate plate and a gate valve, which comprise a valve body and a gate plate, the valve body is provided with a flow channel for liquid flow, the gate plate is installed in the valve body and is used for changing the on-off of the flow channel of the gate valve, and the gate plate can be moved in a first direction so that the gate plate opens or closes the flow channel. The gate plate comprises a gate plate body and guide blocks, both ends of the gate plate body are provided with the guide blocks in a second direction, and the guide blocks are used for limiting the gate plate body in the second direction. The guide blocks arranged on both sides of the gate plate are used for limiting the gate plate in the closed state of the valve body, so that the gate plate is prevented from being dislocated with the flow channel, the water leakage phenomenon of the gate valve in the closed state is prevented, the sealing performance of the gate valve in the closed state is improved, and the use stability of the gate valve is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve body structure technology, specifically to a gate and a gate valve. Background Technology

[0002] A gate valve is a common type of shut-off valve, mainly consisting of a screw, a valve body, and a gate. The screw is connected to the gate and drives the gate to move up and down. A regulating chamber for gate movement is formed within the valve body, with openings at both ends to connect the regulating chamber to the flow path of the valve body. By moving the gate up and down with the screw, the opening area of ​​the regulating chamber is changed, thereby controlling the flow of fluid within the valve body.

[0003] Most gate valves and regulating channels on the market are wedge-shaped structures. During the descent of the gate valve, the two end faces of the gate valve abut against the inner wall where the opening of the regulating cavity is located, thereby cutting off the flow channel and keeping the gate valve in a closed state.

[0004] However, during the adjustment of the gate by the screw in this type of gate valve, the screw is prone to swinging, causing the gate to swing along the inner wall parallel to the opening of the adjustment chamber. This results in the gate being misaligned with the opening when the opening is closed, causing the gate valve to leak and affecting its operational stability. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a gate and a gate valve to prevent leakage caused by gate misalignment, thereby improving the stability of the gate valve in use.

[0006] A gate is used to change the flow path of a gate valve, and the gate moves along a first direction to open or close the flow path. The gate includes a gate body and guide blocks. Guide blocks are provided at both ends of the gate body along a second direction, and each guide block protrudes from the gate body along the second direction. The first direction, the second direction and the liquid flow direction in the flow path are perpendicular to each other.

[0007] Furthermore, along the second direction, at least two guide blocks are formed on the same side of the gate body, and the at least two guide blocks on the same side of the gate body are distributed along the liquid flow direction in the flow channel.

[0008] Furthermore, the gate body has an annular groove and two sealing parts. The annular groove is formed on the circumferential sidewall of the gate body along the liquid flow direction in the flow channel, and the two sealing parts are located on both sides of the annular groove.

[0009] Furthermore, the guide block is located at the connection between the annular groove and the sealing part.

[0010] Furthermore, along the first direction, the guide block is located in the middle of the gate body.

[0011] Furthermore, the gate body is circular along the direction of liquid flow within the channel; the guide blocks are located at both ends of the gate body along the diameter of the second direction.

[0012] Furthermore, a marking protrusion is formed on one end face of the gate body along the direction of liquid flow in the flow channel.

[0013] Furthermore, the gate also includes a mounting post, which is connected to the side wall of the gate body and extends along a first direction, with a screw hole formed inside the mounting post.

[0014] A gate valve includes: a valve body and the gate plate mentioned above. The valve body has a flow channel for liquid to flow through it, and two annular mounting portions are formed in the flow channel. An adjustment cavity is formed between adjacent annular mounting portions. When the gate plate closes the flow channel, a plurality of guide blocks abut against the inner wall of the adjustment cavity intersecting with a second direction.

[0015] Furthermore, the valve body also has a connecting cavity extending along the first direction, which is connected to the regulating cavity; when the gate opens the flow channel, multiple guide blocks respectively abut against the inner wall of the connecting cavity intersecting with the second direction.

[0016] By setting guide blocks on both sides of the gate to limit the gate when the valve body is in the closed state, the gate and the flow channel are prevented from being misaligned, thereby preventing water leakage when the gate valve is closed, improving the sealing performance of the gate valve in the closed state, and thus improving the stability of the gate valve in use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the gate valve provided in this application.

[0018] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the gate valve during the opening and closing process.

[0019] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of the gate valve.

[0020] Figure 4 yes Figure 1 The diagram shows the structure of the gate of the gate valve.

[0021] Figure 5 yes Figure 4 The front view of the gate shown.

[0022] Figure 6 yes Figure 4 The side view of the gate shown.

[0023] Figure 7 yes Figure 1 The diagram shows the structural structure of the gate valve body.

[0024] Figure 8 yes Figure 7 The cross-sectional view of the valve body shown.

[0025] Reference numerals in the attached drawings: Gate 1, Gate body 1-1, Guide block 1-2, Marking protrusion 1-3, Mounting post 1-4, Screw hole 1-5, Through hole 1-6, Weight reduction groove 1-7, Annular groove 1-8, Sealing part 1-9, First sealing surface 1-10, Second sealing surface 1-11, Reinforcing plate 1-12, Valve body 2, Flow channel 2-1, Annular mounting part 2-2, Adjusting cavity 2-3, Support step 2-4, First pipe part 2-5, Second pipe part 2-6, Third pipe part 2-7, Connecting cavity 2-8, Screw 3, Handle 4, End cap 5, Rotating cavity 5-1, Limiting ring 5-2. Detailed Implementation

[0026] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, as one implementation, this application provides a gate valve, including a valve body 2 and a gate 1. The valve body 2 has a flow channel 2-1 for liquid to flow through it. The gate 1 is installed inside the valve body 2 and is used to change the opening and closing of the flow channel of the gate valve. Specifically, the gate 1 can move along a first direction so that the gate 1 opens or closes the flow channel 2-1.

[0028] The gate 1 includes a gate body 1-1 and guide blocks 1-2. Guide blocks 1-2 are provided at both ends of the gate body 1-1 along the second direction, and each guide block 1-2 protrudes from the gate body 1-1 along the second direction so that the guide blocks 1-2 can limit the gate body 1-1 along the second direction.

[0029] When the gate 1 closes the flow channel 2-1, the end face of the gate body 1-1 facing the flow channel 2-1 abuts against the end face of the flow channel 2-1. At the same time, the guide block 1-2 abuts against the inner wall of the valve body 2 intersecting with the second direction. Thus, the guide block 1-2 limits the gate 1 in the second direction, preventing the gate 1 from being misaligned with the flow channel 2-1 when the gate 1 closes the flow channel 2-1. This prevents water leakage when the gate valve is closed, improves the sealing performance of the gate valve in the closed state, and thus improves the stability of the gate valve in use.

[0030] Among them, the first direction, the second direction, and the liquid flow direction within the flow channel are perpendicular to each other. To more clearly describe the technical solution of this application, the following are defined: Figure 1 The directions shown are up, down, left, right, front, and back. The first direction refers to... Figure 1The vertical direction is shown; the second direction refers to... Figure 1 The indicated front-to-back direction; the liquid flow direction within the flow channel refers to... Figure 1 The left and right directions.

[0031] like Figure 3 As shown, in one implementation, at least two guide blocks 1-2 are formed on the same side of the gate body 1-1 along the second direction. These guide blocks 1-2 are distributed along the liquid flow direction within the flow channel. The multiple guide blocks 1-2 on the same side of the gate body 1-1 improve the stability of the contact between the guide blocks 1-2 and the inner wall of the valve body 2, thereby improving the sealing performance of the gate valve in the closed state and thus enhancing the operational stability of the gate valve. Furthermore, by providing multiple guide blocks 1-2, the volume of each guide block 1-2 can be reduced, thus reducing material costs and facilitating the processing of the guide blocks 1-2, thereby improving processing efficiency.

[0032] It should be noted that in this application, two guide blocks 1-2 are formed on the same side of the gate body 1-1. In other embodiments, two or more guide blocks 1-2 may be provided on the same side of the gate body 1-1. This application does not limit the number of guide blocks 1-2 on the same side of the gate body 1-1.

[0033] In one implementation, the gate body 1-1 has an annular groove 1-8 and two sealing parts 1-9. The annular groove 1-8 is formed on the circumferential sidewall of the gate body 1-1, and the two sealing parts 1-9 are located on both sides of the annular groove 1-8 along the axial direction of the gate body 1-1.

[0034] Each sealing part 1-9 has a sealing surface formed on it. The sealing surface is annular and located on the end face of the gate body 1-1. This reduces the end face area used for sealing with the flow channel 2-1 and improves the processing convenience of the sealing surface, thereby improving the processing efficiency of the gate 1.

[0035] It should be noted that, in order to ensure the overall strength of the gate body 1-1, the gate 1-8 is located at the middle of the circumference of the gate body 1-1 along the liquid flow direction in the flow channel.

[0036] As one implementation, two guide blocks 1-2 located at the same end of the gate body 1-1 are respectively located at the connection between the annular groove 1-8 and the sealing part 1-9.

[0037] By setting the above, the two guide blocks 1-2 are prevented from being located within the annular groove 1-8, thereby increasing the gauge between the two guide blocks 1-2 and improving the stability of the guide blocks 1-2 in limiting the gate body 1-1.

[0038] By setting the above, the two guide blocks 1-2 are avoided from being located on the side walls of the two sealing parts 1-9 respectively, thereby preventing the gauge between the two guide blocks 1-2 from being too large, and thus reducing the production cost of the gate 1.

[0039] As one implementation, along the first direction, the guide block 1-2 is located in the middle of the gate body 1-1, so that when the gate 1 closes the flow channel 2-1, the guide block 1-2 can stably abut against the inner wall of the flow channel 2-1.

[0040] Furthermore, by placing the guide block 1-2 at the center of the gate body 1-1 along the first direction, while ensuring that the guide block 1-2 protrudes from the gate body 1-1, the thickness of the guide block 1-2 along the second direction is reduced, thereby further reducing the production cost of the gate 1.

[0041] As one implementation method, when observing the liquid flow direction in the flow channel, the gate body 1-1 is circular, and the guide block 1-2 is located at both ends of the diameter of the gate body 1-1 along the second direction. By reducing the thickness of the guide block 1-2 along the second direction, the production cost of the gate 1 can be further reduced.

[0042] It should be noted that the projection of the gate body 1-1 along the liquid flow direction in the flow channel can be of other shapes. The guide block 1-2 is located at the widest position of the projection of the gate body 1-1 along the liquid flow direction in the flow channel, thereby reducing the thickness of the guide block 1-2 along the second direction, thereby further reducing the production cost of the gate 1.

[0043] like Figure 4 and Figure 5 As shown, in one implementation, along the second direction, the guide block 1-2 protrudes from the gate body 1-1 by a length of L1, and the ratio of the maximum length L2 of the gate body 1-1 along the second direction to this length is 0.021 to 0.033. Specifically, along the second direction, the guide block 1-2 protrudes from the gate body 1-1 by a length of L1, and the ratio of the maximum length L2 of the gate body 1-1 along the second direction to this length is 0.024 to 0.03. More specifically, along the second direction, the guide block 1-2 protrudes from the gate body 1-1 by a length of L1, and the ratio of the maximum length L2 of the gate body 1-1 along the second direction to this length is 0.027.

[0044] By adopting the above settings, the guide block 1-2 can be prevented from protruding too much from the gate body 1-1, thereby reducing the production cost of the gate 1 and the valve body 2.

[0045] The above settings can prevent the guide block 1-2 from protruding too little from the gate body 1-1, thus preventing the guide block 1-2 from failing to abut against the inner wall of the gate valve 2 and improving the stability of the gate valve in use.

[0046] As one implementation, along the liquid flow direction within the flow channel, the ratio of the minimum spacing L3 between adjacent guide blocks 1-2 located on the same side of the gate body 1-1 to the maximum thickness L4 of the gate body 1-1 is 0.66-0.46. Specifically, along the liquid flow direction within the flow channel, the ratio of the minimum spacing L3 between adjacent guide blocks 1-2 located on the same side of the gate body 1-1 to the maximum thickness L4 of the gate body 1-1 is 0.61-0.51. More specifically, along the liquid flow direction within the flow channel, the ratio of the minimum spacing L3 between adjacent guide blocks 1-2 located on the same side of the gate body 1-1 to the maximum thickness L4 of the gate body 1-1 is 0.56.

[0047] By setting the above, the ratio of the minimum distance between adjacent guide blocks 1-2 on the same side of the gate body 1-1 to the maximum thickness of the gate body 1-1 can be avoided to be too large, thereby avoiding the distance between the guide block 1-2 and the end face of the gate body 1-1 near the flow channel 2-1 being too small, preventing the guide block 1-2 from interfering with the inner wall of the valve body 2 during the movement of the gate 1, and improving the movement stability of the gate 1.

[0048] The above settings can prevent the ratio of the minimum spacing between adjacent guide blocks 1-2 on the same side of the gate body 1-1 to the maximum thickness of the gate body 1-1 from being too small, thus preventing the gate 1 from being misaligned with the flow channel 2-1 when the gate valve 2 is closed, improving the sealing performance of the gate valve in the closed state, and thereby improving the stability of the gate valve in use.

[0049] As one implementation, the ratio of the thickness L5 of the guide block 1-2 to the maximum thickness L4 of the gate body 1-1 along the liquid flow direction within the flow channel is 0.22 to 0.14. Specifically, the ratio of the thickness L5 of the guide block 1-2 to the maximum thickness L4 of the gate body 1-1 along the liquid flow direction within the flow channel is 0.2 to 0.16. More specifically, the ratio of the thickness L5 of the guide block 1-2 to the maximum thickness L4 of the gate body 1-1 along the liquid flow direction within the flow channel is 0.18.

[0050] The above settings can prevent the thickness of the guide block 1-2 from being too large along the liquid flow direction in the flow channel, reduce the material cost of the gate 1 production, and improve the processing efficiency of the guide block 1-2.

[0051] The above settings can prevent the thickness of the guide block 1-2 along the liquid flow direction in the flow channel from being too small, increase the contact area between the guide block 1-2 and the inner wall of the valve body 2, prevent the guide block 1-2 from scratching the inner wall of the valve body 2 when it comes into contact with the valve body 2, and at the same time improve the stability of the contact between the guide block 1-2 and the inner wall of the valve body 2.

[0052] As one implementation, weight-reducing grooves 1-7 are formed on the two end faces of the gate body 1-1 facing the flow channel 2-1, making the end face of the sealing part 1-9 annular. The weight-reducing grooves reduce the weight of the gate body 1, thereby reducing the production cost of the gate body 1. At the same time, the weight-reducing grooves 1-7 reduce the processing area required for the end face of the gate 1, thereby improving the processing efficiency of the gate 1.

[0053] like Figure 5 As shown, a bisecting plane is defined that is perpendicular to the direction of liquid flow in the flow channel and bisects the gate body 1-1. The sealing parts 1-9 on both sides of the gate 1 are respectively formed with a first sealing surface 1-10 and a second sealing surface 1-11, and the first sealing surface 1-10 and the second sealing surface 1-11 are substantially symmetrical about the bisecting plane.

[0054] When installing the gate 1, the gate 1 has two installation methods: the first sealing surface 1-10 faces the direction of liquid flow and the second sealing surface 1-11 faces the direction of liquid flow. In actual installation, in order to ensure the stability of the gate valve (to prevent leakage when the gate valve is closed), it is necessary to ensure that the first sealing surface 1-10 faces the direction of liquid flow.

[0055] like Figure 3 As shown, in one implementation, a marking protrusion 1-3 is formed on one end face of the gate body 1-1 along the liquid flow direction in the flow channel. The marking protrusion 1-3 distinguishes the end faces of the gate body 1-1 facing the two flow channels 2-1, thereby facilitating the directional installation of the gate 1, improving the installation accuracy of the gate 1, and preventing leakage when the gate valve is closed.

[0056] Specifically, the marking protrusions 1-3 are located on the inner wall of the weight reduction groove 1-7.

[0057] It should be noted that the marking protrusion 1-3 can be a strip-shaped or dot-shaped protrusion structure, or other structures with marking function (e.g., grooves). This application does not limit the specific shape of the marking protrusion 1-3, and the marking protrusion 1-3 can be located on either side of the gate body 1-1 near the first sealing surface 1-10 or the second sealing surface 1-11.

[0058] like Figure 2 and Figure 3As shown, in one implementation, the gate 1 also includes a mounting post 1-4, which is disposed on the side wall of the gate body 1-1 and extends in a first direction. A screw hole 1-5 is formed in the mounting post 1-4, and a screw 3 for adjusting the movement of the gate 1 is screwed to the screw hole 1-5. The gate 1 is driven to move relative to the valve body 2 by rotating the screw 3. A through hole 1-6 coaxial with the screw hole 1-5 is formed in the gate body 1-1. The inner diameter of the through hole 1-6 is larger than the inner diameter of the screw hole 1-5 to prevent the screw 3 for adjusting the movement of the gate 1 from interfering with the through hole 1-6.

[0059] Furthermore, the inner diameter of the through hole 1-6 is at least 1.5 times the diameter of the screw 3 to prevent interference between the screw 3 and the through hole 1-6 during the adjustment of the gate 1.

[0060] As one implementation, a reinforcing plate 1-12 is formed on the outer wall of the mounting column 1-4. The reinforcing plate 1-12 extends into the annular groove 1-8 and is connected to the gate body 1-1, thereby increasing the strength of the mounting column 1-4.

[0061] like Figure 6 and Figure 7 As shown, in one implementation, the valve body 2 includes a first pipe section 2-5, a second pipe section 2-6, and a third pipe section 2-7. The first pipe section 2-5 and the second pipe section 2-6 are located on the same axis, and the third pipe section 2-7 is perpendicular to the first pipe section 2-5 and the second pipe section 2-6.

[0062] The first pipe section 2-5 and the second pipe section 2-6 are connected to form a flow channel 2-1. The liquid flows through the flow channel 2-1 and through the valve body 2. An annular mounting part 2-2 is provided in the first pipe section 2-5 and the second pipe section 2-6 respectively. An adjustment cavity 2-3 is formed between adjacent annular mounting parts 2-2. The gate plate 1 is located in the adjustment cavity 2-3. The flow channel 2-1 is changed by the gate plate 1 moving up and down in the adjustment cavity 2-3.

[0063] Furthermore, a connecting cavity 2-8 extending in the first direction is formed in the third tube section 2-7, and the adjusting cavity 2-3 is connected to the connecting cavity 2-8, increasing the height of the adjusting cavity 2-3 in the moving direction of the gate plate 1 so that the gate plate 1 can move relative to the valve body 2 in the first direction.

[0064] When the gate 1 opens the flow channel 2-1, multiple guide blocks 1-2 respectively abut against the inner wall of the connecting cavity 2-8 that intersects with the second direction, thereby improving the stability of the gate 1 moving within the valve body 2.

[0065] As one implementation, along the liquid flow direction in the flow channel 2-1, the regulating cavity 2-3 located between the first pipe section 2-5 and the second pipe section 2-6 has a wedge-shaped structure. That is, the inner wall near the first pipe section 2-5 and intersecting with the flow channel 2-1 is inclined from top to bottom toward the second pipe section 2-6. Similarly, the inner wall near the second pipe section 2-6 and intersecting with the flow channel 2-1 is inclined from top to bottom toward the first pipe section 2-5.

[0066] Furthermore, along the liquid flow direction within the flow channel 2-1, the gate 1 also has a wedge-shaped structure. That is, along the liquid flow direction within the flow channel 2-1, the thickness of the gate 1 decreases from top to bottom. The wedge-shaped gate 1 cooperates with the wedge-shaped regulating cavity 2-3 to limit the liquid flow direction within the flow channel 2-1. This ensures that when the gate 1 closes the flow channel 2-1, the end face of the gate 1 and the regulating cavity 2-3 abut against the inner wall of the flow channel 2-1.

[0067] At the same time, when the gate 1 closes the flow channel 2-1, multiple guide blocks 1-2 respectively abut against the inner wall of the regulating cavity 2-3 intersecting with the second direction.

[0068] As one implementation method, along the second direction, the regulating cavity 2-3 can also be wedge-shaped. The inner wall of the regulating cavity 2-3 intersecting with the second direction guides the gate plate 1, thereby further limiting the gate plate 1 along the second direction. This prevents the gate plate 1 from misaligning with the flow channel 2-1 when the gate plate 1 closes the flow channel 2-1, prevents water leakage when the gate valve is closed, improves the sealing performance of the gate valve in the closed state, and thus improves the stability of the gate valve in use.

[0069] It should be noted that, along the second direction, the inner wall of the adjustment cavity 2-3 intersecting with the second direction can also be vertical. This application does not limit the tilt angle of the inner wall of the adjustment cavity 2-3 intersecting with the second direction.

[0070] As one implementation, the inner diameter of the annular mounting part 2-2 is smaller than the inner diameter of the flow channel 2-1, so as to form a limiting end face on the side of the mounting part 2-2 facing the flow channel 2-1, which facilitates the limiting of the pipe fittings when installing external pipe fittings.

[0071] As one implementation, the bottom of the regulating cavity 2-3 is arc-shaped, and a support step 2-4 is formed at the bottom of the regulating cavity 2-3. The support step 2-4 includes an upward stepped surface. When the gate 1 closes the flow channel 2-1, the bottom edge of the gate body 1-1 is in contact with the stepped surface of the support step 2-4. The support step 2-4 limits the gate 1 in the closed flow channel 2-1 state, ensuring the movement accuracy of the gate 1 in the first direction, thereby preventing misalignment between the gate 1 and the flow channel 2-1 in the first direction, further preventing water leakage when the gate valve is closed, improving the sealing performance of the gate valve in the closed state, and thus improving the stability of the gate valve in use.

[0072] It should be noted that the projection of the support step 2-4 along the liquid flow direction in the flow channel 2-1 is arc-shaped, which increases the contact area between the support step 2-4 and the gate body 1-1, thereby further improving the accuracy of the gate 1 when the flow channel 2-1 is closed, and thus improving the sealing performance of the gate valve when it is closed.

[0073] As one implementation method, along the first direction, the support step 2-4 is staggered with the gate body 1-1 to prevent the gate 1 from interfering with the support step 2-4 during downward movement, thereby improving the stability of the gate valve.

[0074] like Figure 1 and Figure 2 As shown, in one implementation, the gate valve further includes a screw 3, a handle 4, and an end cap 5. The end cap 5 is fixed to the top of the third tube section 2-7, and a rotating cavity 5-1 is formed inside the end cap 5. At least a portion of the screw 3 is installed in the rotating cavity 5-1, and a ball bearing is placed between the outer wall of the screw 1 and the rotating cavity 5-1 to facilitate rotation of the screw 1 relative to the end cap 5. At least a portion of the screw 3 extends into the third tube section 2-7 to facilitate threaded connection between the screw 3 and the gate plate 1, and at least a portion of the screw 3 extends out of the end cap 5 for mounting the handle 4 to facilitate rotation of the screw 3 via the handle 4.

[0075] As one implementation, the end cover 5 also includes a limiting ring 5-2, which is installed at the bottom of the rotating cavity 5-1 to facilitate the middle limiting mounting of the screw 3 within the transmission cavity 5-1.

[0076] Finally, it should be noted that the above are only some preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A gate (1) for changing the flow path of a gate valve, wherein the gate (1) moves along a first direction to open or close the flow path, characterized in that, The gate (1) includes a gate body (1-1) and guide blocks (1-2). Along the second direction, both ends of the gate body (1-1) are provided with guide blocks (1-2), and along the second direction, each guide block (1-2) protrudes from the gate body (1-1). The first direction, the second direction and the liquid flow direction in the flow channel are perpendicular to each other.

2. A gate according to claim 1, characterized in that, Along the second direction, at least two guide blocks (1-2) are formed on the same side of the gate body (1-1), and the at least two guide blocks (1-2) on the same side of the gate body (1-1) are distributed along the liquid flow direction in the flow channel.

3. A gate according to claim 1, characterized in that, The gate body (1-1) has an annular groove (1-8) and two sealing parts (1-9). The annular groove (1-8) is formed on the circumferential sidewall of the gate body (1-1) along the liquid flow direction in the flow channel. The two sealing parts (1-9) are located on both sides of the annular groove (1-8).

4. A gate according to claim 3, characterized in that, The guide block (1-2) is located at the connection between the annular groove (1-8) and the sealing part (1-9).

5. A gate according to claim 1, characterized in that, Along the first direction, the guide block (1-2) is located in the middle of the gate body (1-1).

6. A gate according to claim 1 or 5, characterized in that, Along the direction of liquid flow within the flow channel, the gate body (1-1) is circular; The guide blocks (1-2) are located at both ends of the gate body (1-1) along the second direction diameter.

7. A gate according to claim 1, characterized in that, The gate body (1-1) has a marking protrusion (1-3) formed on one end face along the direction of liquid flow in the flow channel.

8. A gate according to claim 1, characterized in that, The gate (1) further includes a mounting post (1-4), which is connected to the side wall of the gate body (1-1) and extends along the first direction. A screw hole (1-5) is formed in the mounting post (1-4).

9. A gate valve, characterized in that, include: Gate (1), as described in any one of claims 1-5; The valve body (2) has a flow channel (2-1) for liquid to flow through, and two annular mounting portions (2-2) are formed in the flow channel (2-1), and an adjustment cavity (2-3) is formed between adjacent annular mounting portions (2-2). When the gate (1) closes the flow channel (2-1), the plurality of guide blocks (1-2) respectively abut against the inner wall of the regulating cavity (2-3) intersecting with the second direction.

10. A gate valve according to claim 9, characterized in that, The valve body (2) also has a connecting cavity (2-8) extending along a first direction, and the connecting cavity (2-8) is connected to the regulating cavity (2-3); When the gate (1) opens the flow channel (2-1), the plurality of guide blocks (1-2) respectively abut against the inner wall of the connecting cavity (2-8) intersecting with the second direction.

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