Gate valve sealing structure

Abstract

The utility model relates to the technical field of gate valves, in particular to a gate valve sealing structure which comprises a valve shell, a transmission channel is arranged in the valve shell, a sealing channel is arranged in the middle of the transmission channel, a sealing block capable of moving up and down is arranged in the sealing channel, and an inner downward pressing rod is rotationally installed at the top of the sealing block. And an outer lower pressing rod is arranged outside the inner lower pressing rod. The sealing function is achieved through the sealing channel in the valve shell and the sealing block capable of moving up and down. The sealing block is in threaded connection with an outer pressing rod through an inner pressing rod, and is in inserted connection with a first driving rod and a second driving rod, so that the vertical movement control of the sealing block is realized, and the sealing state of the channel is controlled. By means of the structural design, the sealing performance of the gate valve is more reliable, operation is easy and convenient, the inner pressing rod and the outer pressing rod are arranged, secondary compaction can be conducted on the sealing block and the sealing channel, and the sealing performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gate valves, in particular to a gate valve sealing structure. Background Art

[0002] In the field of gate valve technology, as a commonly used fluid control device, the sealing performance of a gate valve is directly related to its performance and lifespan. Traditional gate valve sealing structures often use a single sealing method, such as a gasket or sealing ring. However, this single sealing method is prone to problems such as loose sealing and leakage during actual use due to factors such as fluid pressure and temperature fluctuations, as well as wear caused by long-term use, thus affecting the normal use and lifespan of the gate valve.

[0003] To address this issue, various improvements have been attempted, such as using higher-performance sealing materials and optimizing sealing structures. However, these methods can only improve sealing performance to a certain extent, but cannot fundamentally solve the problem of loose sealing. Therefore, we propose a gate valve sealing structure. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a gate valve sealing structure.

[0005] The technical solution of the utility model is:

[0006] A gate valve sealing structure includes a valve housing, a transmission channel is provided inside the valve housing, a sealing channel is provided in the middle of the transmission channel, a sealing block that can move up and down is provided in the sealing channel, an inner down-pressure rod is rotatably installed on the top of the sealing block, an outer down-pressure rod is provided outside the inner down-pressure rod, the outer wall of the inner down-pressure rod is threadedly connected to the inner wall of the outer down-pressure rod, a fixing sleeve is fixedly connected to the top of the valve housing by bolts, a first driving rod is threadedly connected to the fixing sleeve, a second driving rod is threadedly connected to the inner wall of the first driving rod, the first driving rod and the second driving rod are plugged into the outer down-pressure rod and the inner down-pressure rod respectively, and the outer wall of the outer down-pressure rod is threadedly connected to the valve housing.

[0007] As a preferred technical solution, a first sealing gasket is fixedly installed on the inner ring wall of the sealing channel, and a second sealing gasket is fixedly installed on the outer wall of the sealing block.

[0008] As a preferred technical solution, the sealing block is in the shape of an inverted truncated cone, and the sealing channel is adapted to the shape and size of the sealing block.

[0009] As a preferred technical solution, a first driving disk is coaxially fixed to the first driving rod, and a second driving disk is coaxially fixed to the second driving rod.

[0010] As a preferred technical solution, the second driving rod extends above the first driving disk.

[0011] As a preferred technical solution, a first driving block is coaxially fixed to the bottom of the first driving rod, and a second driving block is coaxially fixed to the bottom of the second driving rod. Both the first driving block and the second driving block are square.

[0012] As a preferred technical solution, a first driving groove adapted to the size of the first driving block is opened on the top of the outer pressing rod, and a second driving groove adapted to the size of the second driving block is opened on the top of the inner pressing rod.

[0013] As a preferred technical solution, when the fixing sleeve is fixed to the valve housing by bolts, the first driving block is located in the second driving groove, and the second driving block is located in the first driving groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This utility model achieves sealing through a sealing channel within the valve housing and a movable sealing block. The sealing block is threadedly connected by an inner and outer push-down rods, and plugged into a first and second drive rods, enabling the upward and downward movement of the sealing block, thereby controlling the sealing state of the channel. This structural design enhances the gate valve's sealing performance and facilitates operation. Furthermore, the inner and outer push-down rods provide a secondary compaction between the sealing block and the sealing channel, enhancing sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the internal structure;

[0018] Figure 3 For this utility model Figure 1 Schematic diagram of the local structure;

[0019] Figure 4 This is a schematic structural diagram of the inner and outer push-down rods in the present invention;

[0020] The meaning of each number in the figure is:

[0021] 1. Valve housing; 10. Transmission channel; 11. Sealing channel; 110. First sealing gasket; 12. Sealing block; 120. Second sealing gasket; 13. Inner downward pressure rod; 130. First drive groove; 14. Outer downward pressure rod; 140. Second drive groove; 2. Fixing sleeve; 3. First drive rod; 30. First drive disk; 31. First drive block; 4. Second drive rod; 40. Second drive disk; 41. Second drive block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] See also Figures 1-4 , the utility model provides a technical solution:

[0024] A gate valve sealing structure includes a valve housing 1, with a transmission channel 10 provided inside the valve housing 1, a sealing channel 11 provided in the middle of the transmission channel 10, a sealing block 12 that can move up and down provided in the sealing channel 11, an inner pressure rod 13 rotatably mounted on the top of the sealing block 12, an outer pressure rod 14 provided outside the inner pressure rod 13, the outer wall of the inner pressure rod 13 being threadedly connected to the inner wall of the outer pressure rod 14, a fixing sleeve 2 fixedly connected to the top of the valve housing 1 by bolts, a first drive rod 3 being threadedly connected to the fixing sleeve 2, a second drive rod 4 being threadedly connected to the inner wall of the first drive rod 3, the first drive rod 3 and the second drive rod 4 being plug-connected to the outer pressure rod 14 and the inner pressure rod 13, respectively, and the outer wall of the outer pressure rod 14 being threadedly connected to the valve housing 1. The sealing function is achieved by the sealing channel 11 in the valve housing 1 and the sealing block 12 that can move up and down. The threaded connection between the inner and outer push-down rods 13 and 14, as well as the plug-in connection between the first and second drive rods 3 and 4, allows the upward and downward movement of the sealing block 12 to be controlled, thereby controlling the sealing state of the channel. This structural design makes the gate valve's sealing performance more reliable and easier to operate. Furthermore, the inner and outer push-down rods provide a secondary compaction between the sealing block 12 and the sealing channel 11, further enhancing sealing performance.

[0025] As a preferred embodiment of this embodiment, a first sealing gasket 110 is fixedly mounted on the inner annular wall of the sealing channel 11, and a second sealing gasket 120 is fixedly mounted on the outer wall of the sealing block 12. The first sealing gasket 110 and the second sealing gasket 120 are respectively provided on the sealing channel 11 and the sealing block 12, further enhancing the sealing effect and preventing fluid leakage.

[0026] As a preferred embodiment of the present invention, the sealing block 12 is in the shape of an inverted truncated cone, and the shape and size of the sealing channel 11 are adapted to the sealing block 12. This allows the sealing block 12 to fit more closely with the sealing channel 11 when moving up and down, thereby improving the sealing performance.

[0027] As a preferred embodiment of the present invention, a first driving plate 30 is coaxially fixed to the first driving rod 3, and a second driving plate 40 is coaxially fixed to the second driving rod 4. This facilitates the rotation operation of the driving rod and makes the upward and downward movement of the sealing block 12 more flexible.

[0028] As a preferred embodiment of the present invention, the second driving rod 4 extends above the first driving disk 30. This design prevents the second driving rod 4 from interfering with the first driving disk 30 during rotation, thereby ensuring smooth operation of the driving structure.

[0029] As a preferred feature of this embodiment, a first drive block 31 is coaxially fixed to the bottom of the first drive rod 3, and a second drive block 41 is coaxially fixed to the bottom of the second drive rod 4. Both the first drive block 31 and the second drive block 41 are square in shape. This design allows the drive blocks to be more stably inserted into the corresponding drive slots, improving transmission stability and reliability.

[0030] As a preferred embodiment of this embodiment, a first drive groove 130 is formed at the top of the outer push rod 14 to match the size of the first drive block 31, and a second drive groove 140 is formed at the top of the inner push rod 13 to match the size of the second drive block 41. The drive grooves formed at the tops of the outer push rod 14 and the inner push rod 13 to match the size of the first drive block 31 and the second drive block 41, respectively, enable the drive blocks to be accurately inserted into the corresponding drive grooves, thereby achieving precise control of the sealing block 12.

[0031] As a preferred embodiment of this embodiment, when the fixing sleeve 2 is bolted to the valve housing 1, the first drive block 31 is located in the second drive groove 140, and the second drive block 41 is located in the first drive groove 130. When the fixing sleeve 2 is bolted to the valve housing 1, the first drive block 31 is located in the second drive groove 140, and the second drive block 41 is located in the first drive groove 130. This design ensures that after the gate valve sealing structure is installed, the drive blocks can be accurately aligned with and inserted into the corresponding drive grooves, achieving immediate control of the sealing block 12.

[0032] The gate valve sealing structure of the present invention comprises the following steps when in use:

[0033] Initial state: The gate valve sealing structure is in a non-working state, the sealing block 12 is located in the middle position of the sealing channel 11, the first drive rod 3 and the second drive rod 4 are respectively connected to the valve housing 1 through the fixing sleeve 2, and the first drive block 31 is located in the second drive groove 140, and the second drive block 41 is located in the first drive groove 130.

[0034] Sealing operation: When the gate valve needs to be closed for sealing, the operator first rotates the first drive disk 30. Since the first drive rod 3 is threadedly connected to the fixed sleeve 2, the rotation of the first drive rod 3 will drive the outer downward pressure rod 14 to rotate, causing the first drive rod 3 and the outer downward pressure rod 14 to move downward, thereby driving the sealing block 12 to move downward and seal the sealing channel 11. Then, the second drive rod 4 is screwed, and it drives the inner downward pressure rod 13 to rotate, thereby continuously driving the sealing block 12 to move downward, and tightening the sealing block 12 and the sealing channel 11 for a second time, thereby ensuring the sealing performance.

[0035] Compaction and Sealing: As sealing block 12 moves downward, second sealing gasket 120 on its outer wall comes into close contact with first sealing gasket 110 on the inner wall of sealing channel 11, creating a double seal. Because sealing block 12 is an inverted frustum and the shape and size of sealing channel 11 match, sealing block 12 fits more closely against sealing channel 11 during downward movement, improving sealing performance.

[0036] Opening Operation: To open the gate valve, the operator rotates the first and second drive disks 30, 40 in opposite directions, causing the first and second drive rods 3, 4 to move upward. This upward movement of the first and second drive rods 3, 4 drives the inner and outer push-down rods 13, 14 upward, thereby moving the sealing block 12 upward and out of the sealing passage 11, thereby opening the gate valve.

[0037] In summary, the gate valve sealing structure of the present invention controls the vertical movement of the sealing block 12 by rotating the first and second drive disks 30 and 40, thereby sealing and opening the passage. Furthermore, the internal and external push-down rods 13 and 14, as well as the first and second sealing gaskets 110 and 120, further enhance the sealing effect and prevent fluid leakage.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A gate valve sealing structure, comprising a valve housing (1), characterized in that: The valve housing (1) is provided with a transmission channel (10) inside, a sealing channel (11) is provided in the middle of the transmission channel (10), a sealing block (12) that can move up and down is provided in the sealing channel (11), an inner down-pressing rod (13) is rotatably installed on the top of the sealing block (12), an outer down-pressing rod (14) is provided outside the inner down-pressing rod (13), the outer wall of the inner down-pressing rod (13) is threadedly connected to the inner wall of the outer down-pressing rod (14), a fixing sleeve (2) is fixedly connected to the top of the valve housing (1) by bolts, a first driving rod (3) is threadedly connected to the fixing sleeve (2), a second driving rod (4) is threadedly connected to the inner wall of the first driving rod (3), the first driving rod (3) and the second driving rod (4) are plug-connected to the outer down-pressing rod (14) and the inner down-pressing rod (13) respectively, and the outer wall of the outer down-pressing rod (14) is threadedly connected to the valve housing (1).

2. The gate valve sealing structure according to claim 1, wherein: A first sealing gasket (110) is fixedly mounted on the inner ring wall of the sealing channel (11), and a second sealing gasket (120) is fixedly mounted on the outer wall of the sealing block (12).

3. The gate valve sealing structure according to claim 2, wherein: The sealing block (12) is in the shape of an inverted truncated cone, and the sealing channel (11) is adapted to the sealing block (12) in shape and size.

4. The gate valve sealing structure according to claim 3, wherein: A first driving disk (30) is coaxially fixed to the first driving rod (3), and a second driving disk (40) is coaxially fixed to the second driving rod (4).

5. The gate valve sealing structure according to claim 4, wherein: The second driving rod (4) extends above the first driving disk (30).

6. The gate valve sealing structure according to claim 5, wherein: A first driving block (31) is coaxially fixed to the bottom of the first driving rod (3), and a second driving block (41) is coaxially fixed to the bottom of the second driving rod (4). Both the first driving block (31) and the second driving block (41) are square.

7. The gate valve sealing structure according to claim 6, wherein: A first driving groove (130) having a size adapted to the first driving block (31) is formed on the top of the outer pressing rod (14), and a second driving groove (140) having a size adapted to the second driving block (41) is formed on the top of the inner pressing rod (13).

8. The gate valve sealing structure according to claim 7, wherein: When the fixing sleeve (2) is fixed to the valve housing (1) by means of bolts, the first driving block (31) is located in the second driving groove (140), and the second driving block (41) is located in the first driving groove (130).

Images