Parallel type double-gate-disc gate valve

Abstract

The utility model discloses a parallel type double-gate-plate gate valve, and belongs to the technical field of valves. The valve mainly comprises a valve body; the valve cover is mounted at the upper end of the valve body; the transmission mechanism is mounted at the upper end of the valve cover; the purging mechanisms are installed on the two sides of the valve body, each purging mechanism is provided with a fixing plate, and each purging mechanism comprises a clamping groove formed in the corresponding fixing plate; the purging pipelines are mounted on the two sides of the valve body; the sealing ring is mounted at the joint of the purging pipeline and the valve body; and the plug is mounted at one end of the purging pipeline. According to the parallel type double-gate-plate gate valve, by arranging the purging mechanism, the valve plate can be purged after impurities contained in a medium are deposited in the using process of the gate valve, and the effect that the impurities are prevented from abrading the gate valve is achieved.

Description

Technical Field

[0001] This application relates to the technical field of valves, and specifically to a parallel double-gate valve. Background Art

[0002] A gate valve is a commonly used pipeline valve, which mainly controls the flow of the medium by the lifting of the gate plate. It has the characteristics of simple structure, good sealing performance, small flow resistance, flexible opening and closing, etc., and is widely used in various industrial fields.

[0003] A parallel double-gate valve consists of components such as a valve body, a valve cover, a valve stem, a double gate plate, and sealing packing. Its working principle is that the lifting movement of the valve stem drives the double gate plate to move up and down, thereby realizing the truncation or flow-through of the medium in the pipeline. This valve is suitable for medium and large-diameter pipelines, and is widely used especially in pipelines carrying media such as water, sewage, steam, and oil.

[0004] However, during the specific use of the gate valve, it is possible that the medium contains suspended particles, impurities or solids. These substances may deposit inside the valve body during the flow process. These impurities and particulate matters will cause wear to components such as the valve body and the gate plate during the opening and closing of the valve, shortening the service life of the valve.

[0005] Therefore, it is necessary to provide a parallel double-gate valve to solve the above problems.

[0006] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute the prior art. Summary of the Invention

[0007] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a parallel double-gate valve, which solves the problem that impurities contained in the medium will cause wear to the gate valve after deposition during the use of the gate valve.

[0008] The technical solution adopted by this application to solve its technical problems is: a parallel double-gate valve, including:

[0009] A valve body;

[0010] A valve cover, which is installed at the upper end of the valve body;

[0011] A transmission mechanism, which is installed at the upper end of the valve cover. The transmission mechanism is used to control the opening and closing of the gate valve to realize the on-off of the fluid;

[0012] A purging mechanism, which is installed on both sides of the valve body. The purging mechanism is used to remove residual fluid or impurities. The purging mechanism has a fixing plate, and the purging mechanism includes:

[0013] A card slot, which is installed on the fixed plate;

[0014] A purging pipeline, which is installed on both sides of the valve body;

[0015] A sealing ring, which is installed at the connection between the purging pipeline and the valve body;

[0016] A plug, which is installed at one end of the purging pipeline.

[0017] Furthermore, connection ports are fixedly arranged at both ends of the valve body.

[0018] Furthermore, the transmission mechanism includes a valve stem threadedly arranged on the valve cover, a packing fixedly arranged at the upper end of the valve cover, and a gland fixedly arranged at the upper end of the packing.

[0019] Furthermore, a hand wheel is fixedly arranged at one end of the valve stem, and a wedge-shaped block is connected to the other end of the valve stem by a bearing.

[0020] Furthermore, tensioning blocks are arranged at both ends of the wedge-shaped block, a channel is formed between the tensioning blocks at both ends, a valve plate is fixedly arranged on one side of the tensioning blocks, and a sealing disc is fixedly arranged on one side of the valve plate.

[0021] Furthermore, a through hole is formed inside the fixed plate, and the purging pipeline passes through the valve body and is communicated with the through hole inside the fixed plate.

[0022] Furthermore, a discharge port is formed at the lower end of the valve body, and a blocking cover is detachably arranged on the discharge port.

[0023] The beneficial effect of this application is: A parallel double-gate valve provided by this application, by setting a purging mechanism, achieves the effect that during the use of the gate valve, after impurities contained in the medium are deposited, the valve plate can be purged to prevent the impurities from causing wear to the gate valve after deposition.

[0024] In addition to the purposes, features and advantages described above, this application has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The attached drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0026] Figure 1 is an overall schematic diagram of a parallel double-gate valve in this application;

[0027] Figure 2 This is an exploded view of a parallel double - gate valve in this application;

[0028] Figure 3 is Figure 1 an exploded view of the transmission mechanism in;

[0029] Figure 4 This is a sectional view of a parallel double - gate valve in this application;

[0030] Figure 5 is Figure 4 an exploded view of the purging mechanism in;

[0031] Among them, each reference numeral in the figure:

[0032] 1, valve body; 2, transmission mechanism; 3, connection port; 21, valve cover; 22, packing; 23, handwheel; 24, valve stem; 25, valve plate; 26, wedge - shaped block; 27, tensioning block; 28, gland; 30, discharge port; 4, purging mechanism; 43, clamping groove; 44, fixing plate; 45, sealing ring; 46, purging pipeline; 47, plug. Specific embodiments

[0033] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the solution of this application, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0035] As Figures 1 - 3 shown, this application provides a parallel double - gate valve, including a valve body 1. The valve body 1 serves as the main structure of the entire valve, accommodating and supporting all components inside the valve, ensuring the sealing performance and stability of the valve in the fluid system, and at the same time providing a channel for fluid flow;

[0036] At the same time, connection ports 3 are fixedly arranged at both ends of the valve body 1. The connection ports 3 are used to connect the valve body 1 with the pipeline system to ensure that fluid can flow smoothly into and out of the valve body 1. And a valve cover 21 is fixedly arranged at the upper end of the valve body 1. The valve cover 21 is used to protect the sealing components inside the valve body 1 from the influence of the external environment;

[0037] A transmission mechanism 2 is provided at the upper end of the valve cover 21, and the transmission mechanism 2 is used to control the opening and closing of the gate valve to realize the on and off of the fluid;

[0038] The transmission mechanism 2 includes a valve stem 24 threadedly disposed on the valve cover 21, and one end of the valve stem 24 penetrates the valve cover 21 and extends to the inside of the valve body 1;

[0039] A packing 22 is fixedly arranged on the upper end of the valve cover 21, and the packing 22 is used to seal the valve stem 24 to prevent the fluid from leaking through the gap between the valve stem 24 and the valve cover 21. A gland 28 is fixedly arranged on the upper end of the packing 22, and the gland 28 is used to fix the packing 22 to prevent it from loosening or leaking, and may help to enhance the sealing performance of the valve stem 24.

[0040] A hand wheel 23 is fixedly provided at one end of the valve stem 24 near the gland 28, and the hand wheel 23 is used to provide an interface for manual operation by the staff. By rotating the hand wheel 23, the valve stem 24 can be driven to move up and down, thereby controlling the opening and closing of the gate valve;

[0041] At the same time, the valve stem 24 extends to one end of the valve body 1 and is connected to a wedge block 26, and tensioning blocks 27 are provided at both ends of the wedge block 26. The tensioning blocks 27 fit with the wedge block 26, and a channel is formed between the tensioning blocks 27 at both ends. When the hand wheel 23 is rotated to drive the valve stem 24 to move downward along the valve cover 21, the tensioning blocks 27 at both ends can be driven to move downward synchronously through the wedge block 26.

[0042] A valve plate 25 is fixedly arranged on one side of the tension block 27. The valve plate 25 is arranged in parallel at both ends of the wedge block 26 to reduce the energy loss of the fluid at the valve body 1 and improve the overall efficiency of the pipeline system. A sealing disk (not shown in the figure) is fixedly arranged on one side of the valve plate 25. The sealing disk is used to prevent fluid leakage when the valve plate 25 seals the valve body 1.

[0043] When the valve body 1 is closed, the hand wheel 23 can be rotated to drive the valve stem 24 to move downward along the valve cover 21, and the tensioning blocks 27 at both ends are driven to move downward synchronously through the wedge block 26, so that the valve plate 25 moves accordingly. When the valve plate 25 moves to the lower end of the valve body 1, it stops moving, and the wedge block 26 continues to move downward along the channel formed between the tensioning blocks 27 at both ends. At this time, under the action of the wedge block 26, two horizontal forces are generated, pressing the left and right sealing disks against the internal sealing surface of the lower end of the valve body 1, thereby forming a two-way forced seal;

[0044] When the valve body 1 is opened, the hand wheel 23 can be rotated in the opposite direction to drive the valve stem 24 to move upward along the valve cover 21, thereby driving the wedge block 26 to move upward through the valve stem 24. At this time, the horizontal extrusion force contacts, so that the left and right tensioning blocks 27 and the sealing disk are closed and separated from the sealing surface, thereby opening the valve body 1;

[0045] As Figure 1 and Figures 4 - 5 shown, purge mechanisms 4 are fixedly arranged on both sides of the valve body 1. The purge mechanisms 4 are used to remove residual fluid or impurities, keep the valve plate 25 clean, and prevent solid particles remaining inside the valve body 1 from scratching the valve plate 25;

[0046] The purge mechanism 4 includes a fixing plate 44 fixedly arranged inside the valve body 1. A clamping groove 43 is fixedly arranged on the fixing plate 44. The clamping groove 43 fits with both sides of the valve plate 25 to provide a guiding function for the ascending and descending of the valve plate 25, thereby enhancing the stability of the system;

[0047] Meanwhile, through holes are formed inside the fixing plate 44. Meanwhile, a purge pipeline 46 is fixedly arranged outside the valve body 1. The purge pipeline 46 penetrates the valve body 1 and is connected to the through holes inside the fixing plate 44 to facilitate the smooth passage of the purge medium through the pipeline to the inside of the valve body 1;

[0048] Meanwhile, a sealing ring 45 is fixedly arranged at the connection between the purge pipeline 46 and the valve body 1. The sealing ring 45 is compressed and deformed to fill the gap, thereby preventing fluid leakage. Meanwhile, a plug 47 is detachably arranged at one end of the purge pipeline 46 far from the valve body 1. The plug 47 closes the opening of the pipeline or valve to prevent fluid leakage or impurities from entering;

[0049] Meanwhile, a discharge port 30 is formed at the lower end of the valve body 1. The discharge port 30 is used to discharge the residual fluid or impurities inside the valve body 1 to facilitate the maintenance and cleaning of the inside of the valve body 1. And a blocking cover (not shown in the figure) is detachably arranged on the discharge port 30. When the purge mechanism 4 cleans the inside of the valve body 1, the staff can open the discharge port 30 to discharge the impurities and solid particles inside the valve body 1 from the valve body 1;

[0050] When the valve body 1 is closed, the clamping groove 43 inside the valve body 1 of the valve plate 25 provides a guiding function for the descent of the valve plate 25 to facilitate more precise sealing of the valve plate 25. When the valve plate 25 smoothly moves down along the fixing plate 44 to a proper position, the valve plate 25 stops descending. At this time, the valve plate 25 performs a sealing operation on the valve body 1;

[0051] At this time, the staff opens the plug 47 of the purge mechanism 4 to clean the valve plate 25 to prevent impurities and solid particles from remaining on the valve plate 25 when the valve body 1 is closed, thereby scratching the valve plate 25 and causing the situation of poor sealing and fluid leakage. When the purging is completed, the blocking cover can be opened to discharge the residues inside the valve body 1 from the valve body 1.

[0052] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A parallel double-disc gate valve, characterized in that: include: Valve body (1); A valve cover (21), the valve cover (21) being mounted on the upper end of the valve body (1); A transmission mechanism (2), the transmission mechanism (2) being mounted on the upper end of the valve cover (21), the transmission mechanism (2) being used to control the opening and closing of the gate valve to achieve on-off of the fluid; A purge mechanism (4) is installed on both sides of the valve body (1), the purge mechanism (4) is used to remove residual fluid or impurities, the purge mechanism (4) has a fixing plate (44), and the purge mechanism (4) comprises: A card slot (43), the card slot (43) being mounted on the fixing plate (44); a purge pipe (46), the purge pipe (46) being installed on both sides of the valve body (1); a sealing ring (45), the sealing ring (45) being installed at the connection between the purge pipe (46) and the valve body (1); A plug (47) is installed at one end of the purge pipe (46).

2. A parallel double-disc gate valve according to claim 1, characterized in that: Connecting ports (3) are fixedly provided at both ends of the valve body (1).

3. A parallel double-disc gate valve according to claim 1, characterized in that: The transmission mechanism (2) comprises a valve stem (24) threadedly arranged on the valve cover (21), a packing (22) is fixedly arranged on the upper end of the valve cover (21), and a pressure cover (28) is fixedly arranged on the upper end of the packing (22).

4. A parallel double-disc gate valve according to claim 3, characterized in that: A hand wheel (23) is fixedly provided at one end of the valve stem (24), and a wedge block (26) is bearing-connected at the other end of the valve stem (24).

5. A parallel double-disc gate valve according to claim 4, characterized in that: Tension blocks (27) are provided at both ends of the wedge-shaped block (26), a channel is formed between the tension blocks (27) at both ends, a valve plate (25) is fixedly provided on one side of the tension block (27), and a sealing disk is fixedly provided on one side of the valve plate (25).

6. A parallel double-disc gate valve according to claim 1, characterized in that: A through hole is provided inside the fixing plate (44), and the purge pipe (46) passes through the valve body (1) and is connected to the through hole inside the fixing plate (44).

7. A parallel double-disc gate valve according to claim 1, characterized in that: The valve body (1) has a discharge port (30) at the lower end, and a blocking cover is detachably provided on the discharge port (30).

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