Gate valve with optimized sealing

Abstract

Two sealing ring assemblies are arranged at the inner ends, in the length direction, of two abutment joint pipes in a sleeving mode correspondingly, and guide grooves are formed in the positions, on the two sides of the abutment joint pipes, of the face, away from an abutment sealing ring, of an abutment supporting ring correspondingly; the length direction of the base station guide groove is consistent with that of the base station valve rod, and the base station guide groove has an upward gradient in the direction deviating from the base station valve cover; according to the sealing-optimized gate valve, the length direction of the guide groove is consistent with the length direction of the valve rod, and the guide groove has an upward slope in the direction away from the valve cover; a wedge-shaped driving strip on the driving assembly is matched with the guide groove to drive the sealing ring assembly, and the wedge-shaped driving strip acts with the guide groove under the condition that no other power exists. When the valve plate is combined with the valve seat, the driving strip is matched with the guide groove to press the sealing ring assembly to the valve plate, so that an auxiliary sealing effect is formed between the sealing ring assembly and the valve plate; when the valve plate moves, the sealing ring assembly can clean the valve plate.

Description

Technical Field

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

[0002] A gate valve is a valve used to control the flow of fluids (such as gases and liquids). It controls the flow of fluids by opening or closing the channel through a flat plate (gate) perpendicular to the flow direction of the fluid. The gate valve is characterized by good sealing performance and low fluid resistance when opening and closing. It is suitable for most media, including high-pressure and large-diameter pipelines. The opening and closing of the gate valve usually requires a large torque, so it is often equipped with gears or other power-assisting devices.

[0003] There are two basic types of gate valve seats, namely, the valve seat section is plate-shaped and wedge-shaped. Generally speaking, the valve seat with a wedge-shaped section can achieve a better sealing effect, but the sealing structure is easily damaged, and due to the wedge-shaped characteristics of the valve seat, it is also easier to deposit impurities. The valve seat with a plate-shaped section has a slightly worse sealing effect. Utility Model Content

[0004] The main purpose of the utility model is to provide a gate valve with optimized sealing, aiming to solve the problem that although the valve seat with a wedge-shaped cross-section in the gate valve can achieve a relatively superior sealing effect, the sealing structure is easily damaged and impurities are easily deposited due to the wedge-shaped characteristics of the valve seat.

[0005] In order to achieve the above object, the utility model provides a gate valve with optimized sealing, comprising:

[0006] A valve body, wherein a working cavity is arranged inside, and joint pipes are arranged at both ends of the valve body in the thickness direction, and the joint pipes extend into the working cavity to form a valve seat with a circular ring;

[0007] The valve plate is arranged to correspond to the valve seat and has a uniform thickness in the area corresponding to the valve seat;

[0008] A valve cover, connected to the valve body;

[0009] A valve stem is movably mounted on the valve cover in a length direction, and an inner end of the valve stem is connected to the valve cover;

[0010] Two sealing ring assemblies are respectively sleeved on the inner ends of the two joint pipes in the length direction, the sealing ring assemblies include a support ring and a sealing ring which are stacked and fixed on each other, the sealing ring is arranged corresponding to the valve plate, and a guide groove is respectively arranged on the side of the joint pipe on the side of the support ring away from the sealing ring, the length direction of the guide groove is consistent with the valve stem and has an upward slope in the direction away from the valve cover;

[0011] A drive assembly is connected to the valve stem, and is provided with four wedge-shaped drive strips, wherein when the valve plate is combined with the valve seat, the drive strips match the guide grooves to press the sealing ring assembly toward the valve plate.

[0012] Furthermore, the outer wall of the inner end of the joint pipe in the length direction is in an outwardly expanded frustum shape.

[0013] Furthermore, the taper of the frustum-shaped portion of the joint pipe is between 1:20 and 1:40.

[0014] Furthermore, the valve plate is made of hard alloy.

[0015] Furthermore, an annular cleaning brush is respectively provided on both sides of the valve plate in the thickness direction, wherein when the valve plate is combined with the valve seat, the cleaning brush is located on the outer periphery of the sealing ring assembly.

[0016] Furthermore, the free end ring of the joint pipe is provided with a fixing hole for connecting a bolt assembly.

[0017] Furthermore, the sealing ring is made of plastic or rubber.

[0018] Furthermore, the drive assembly is connected to the valve stem via a pin.

[0019] Further, when the valve plate is separated from the valve seat to a maximum extent, the driving bar is located in the guide groove.

[0020] Furthermore, the width of the sealing ring assembly is 2 to 5 centimeters.

[0021] The utility model provides a gate valve with optimized sealing, wherein two sealing ring assemblies are respectively sleeved on the inner ends of the two joint pipes in the length direction. A guide groove is respectively provided on the side of the support ring away from the sealing ring at the two sides of the joint pipe. The length direction of the guide groove is consistent with the valve stem and has an upward slope in the direction away from the valve cover; the wedge-shaped driving strip on the driving assembly cooperates with the guide groove to realize the driving of the sealing ring assembly, and interacts with the guide groove in the absence of other power. When the valve plate is combined with the valve seat, the driving strip matches the guide groove to press the sealing ring assembly toward the valve plate, thereby forming an auxiliary sealing effect between the sealing ring assembly and the valve plate; when the valve plate moves, the sealing ring assembly can clean the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a gate valve with optimized sealing according to the first embodiment of the utility model;

[0023] Figure 2 It is a cross-sectional schematic diagram of a gate valve with optimized sealing according to the first embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of an eccentric cross-section of a gate valve with optimized sealing in the first embodiment of the utility model;

[0025] Figure 4 yes Figure 3 A partial enlarged view of the

[0026] Figure 5 It is a schematic diagram of a drive assembly in a gate valve with optimized sealing according to the first embodiment of the utility model.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0030] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0031] Reference Figures 1 to 5 In one embodiment of the utility model, a gate valve with optimized sealing includes:

[0032] The valve body 100 is provided with a working chamber 110 inside, and joint pipes 120 are respectively provided at both ends of the valve body 100 in the thickness direction, and the joint pipes 120 extend into the working chamber 110 to form a circular valve seat 130;

[0033] The valve plate 200 is disposed corresponding to the valve seat 130 and has a uniform thickness in the area corresponding to the valve seat 130;

[0034] A valve cover 300, connected to the valve body 100;

[0035] A valve stem 400 is movably mounted on the valve cover 300 in a length direction, and an inner end of the valve stem 400 is connected to the valve cover 300;

[0036] Two sealing ring assemblies 500 are respectively sleeved on the inner ends of the two joint pipes 120 in the length direction. The sealing ring assembly 500 includes a support ring 510 and a sealing ring 520 which are stacked and fixed on each other. The sealing ring 520 is arranged corresponding to the valve plate 200. A guide groove 530 is respectively arranged on the side of the joint pipe 120 away from the sealing ring 520. The length direction of the guide groove 530 is consistent with the valve stem 400 and has an upward slope in the direction away from the valve cover 300.

[0037] The drive assembly 600 is connected to the valve stem 400 , and is provided with four wedge-shaped drive bars 610 , wherein when the valve plate 200 is combined with the valve seat 130 , the drive bars 610 match with the guide grooves 530 to press the sealing ring assembly 500 toward the valve plate 200 .

[0038] In the prior art, although a valve seat with a wedge-shaped cross section can achieve a relatively superior sealing effect, the sealing structure is easily damaged and impurities are easily deposited due to the wedge-shaped characteristics of the valve seat. A valve seat with a plate-shaped cross section has a slightly poorer sealing effect.

[0039] In the present invention, a working chamber 110 is provided inside the valve body 100. Joint pipes 120 are provided at both ends of the valve body 100 in the thickness direction. The joint pipe 120 extends into the working chamber 110 to form a circular valve seat 130. The plane direction of the valve seat 130 is consistent with the length direction of the subsequent valve stem 400, thereby forming the above-mentioned annular valve seat 130. It should be noted that the inner diameter of the joint pipe 120 in the length direction is not limited to be uniform, but only represents that the whole forms a tubular structure.

[0040] The valve plate 200 is arranged in correspondence with the valve seat 130 when it is separated and combined. Since the distance between the two annular valve seats 130 is consistent, the thickness of the area of ​​the valve plate 200 corresponding to the valve seat 130 is uniform. The thickness uniformity is not limited in the position where the valve plate 200 does not match the valve seat 130. When the valve plate 200 is combined with the valve seat 130, the entire gate valve is in a closed state, and when the valve plate 200 is separated from the valve seat 130, the entire gate valve is in an open state.

[0041] The valve cover 300 is connected to the valve body 100 . The valve cover 300 is combined with the valve body 100 , and the specific combination can be completed by a plurality of bolt assemblies, so that the working chamber 110 is closed.

[0042] The valve stem 400 is movably mounted on the valve cover 300 in the length direction, and the inner end of the valve stem 400 in the length direction is connected to the valve cover 300. The installation method of the valve stem 400 refers to the existing conventional design and is not specifically limited. The driving method of the valve stem 400 can be manual or motor. The movement of the valve stem 400 in the length direction can be achieved by a screw structure.

[0043] The two sealing ring assemblies 500 are respectively sleeved on the inner ends of the two joint pipes 120 in the length direction. The sealing ring assembly 500 includes a support ring 510 and a sealing ring 520 that are stacked and fixed on each other. The connection between the support ring 510 and the sealing ring 520 can be bonding, clamping or screw connection. The sealing ring 520 is arranged corresponding to the valve plate 200. A guide groove 530 is respectively arranged on both sides of the joint pipe 120 on the side of the support ring 510 away from the sealing ring 520. The length direction of the guide groove 530 is consistent with the valve stem 400 and has an upward slope in the direction away from the valve cover 300. The setting of the guide groove 530 provides a basis for the movement of the sealing ring assembly 500 in the length direction of the joint pipe 120.

[0044] The driving assembly 600 is connected to the valve stem 400, and four wedge-shaped driving strips 610 are arranged on the driving assembly 600. For example, the driving assembly 600 includes a base and four driving strips 610 connected to the base, and the base is connected to the valve stem 400 through a pin, so that the entire driving assembly 600 is fixed. The driving of the sealing ring assembly 500 is achieved by the cooperation of the wedge-shaped driving strip 610 and the guide groove 530. Specifically, during the movement of the valve stem 400, the driving strip 610 and the guide groove 530 interact. When the valve plate 200 is combined with the valve seat 130, the driving strip 610 matches the guide groove 530 to press the sealing ring assembly 500 toward the valve plate 200, so that a seal is formed between the sealing ring assembly 500 and the valve plate 200. The cooperation between the sealing ring assembly 500 and the valve plate 200 can provide an auxiliary sealing effect. When the valve plate 200 moves, the sealing ring assembly 500 can clean the valve plate 200.

[0045] In summary, the two sealing ring assemblies 500 are respectively sleeved on the inner ends of the two joint pipes 120 in the length direction. A guide groove 530 is respectively provided on the side of the support ring 510 away from the sealing ring 520 at the two sides of the joint pipe 120. The length direction of the guide groove 530 is consistent with the valve stem 400 and has an upward slope in the direction away from the valve cover 300; the wedge-shaped driving strip 610 on the driving assembly 600 cooperates with the guide groove 530 to realize the driving of the sealing ring assembly 500, and interacts with the guide groove 530 in the absence of other power. When the valve plate 200 is combined with the valve seat 130, the driving strip 610 matches the guide groove 530 to press the sealing ring assembly 500 toward the valve plate 200, thereby forming an auxiliary sealing effect between the sealing ring assembly 500 and the valve plate 200; when the valve plate 200 moves, the sealing ring assembly 500 can clean the valve plate 200.

[0046] Reference Figure 2 In one embodiment, the outer wall of the inner end of the joint pipe 120 in the length direction is in an outwardly expanded frustum shape.

[0047] In this embodiment, by setting the outer wall of the inner end of the joint pipe 120 in the length direction to be in a cone shape, the sealing ring assembly 500 will not fall out of the joint pipe 120. At this time, the structure of the support ring 510 needs to be designed specifically, for example, the support ring 510 is set to be two half rings, so as to realize the assembly and installation process of the support ring 510 in a splicing manner. When the sealing ring assembly 500 is not subjected to external force, the sealing ring assembly 500 can slide slightly at the position of the cone-shaped joint pipe 120 under the action of its own weight, thereby reducing the damage of the valve plate 200 to the sealing ring assembly 500.

[0048] In one embodiment, the taper of the frustum-shaped portion of the joint pipe 120 is between 1:20 and 1:40.

[0049] In this embodiment, the taper at the relevant position of the joint pipe 120 is limited. The specific taper should not be too large, otherwise the installation of the sealing ring assembly 500 will be difficult. At the same time, during use, the sealing ring assembly 500 is also prone to positional abnormalities.

[0050] In one embodiment, the valve plate 200 is made of cemented carbide.

[0051] In this embodiment, the material of the valve plate 200 is limited to hard alloy, so that the structural strength and durability are relatively superior. The specific type of hard alloy is selected according to the specific implementation scenario.

[0052] In one embodiment, an annular cleaning brush is disposed on both sides of the valve plate 200 in the thickness direction, respectively, wherein when the valve plate 200 is combined with the valve seat 130 , the cleaning brush is located at the periphery of the sealing ring assembly 500 .

[0053] In this embodiment, a cleaning brush is provided on the valve plate 200 to clean the valve seat 130 and the sealing ring assembly 500. Specifically, during the implementation process, the position of the cleaning brush needs to be set specifically so as not to interfere with the movement of the valve plate 200 and the sealing process.

[0054] In one embodiment, the free end ring of the joint pipe 120 is provided with a fixing hole for connecting a bolt assembly.

[0055] In this embodiment, the connection method of the joint pipe 120 to the external pipeline is set as a bolt assembly connection, for example, a flange ring is set on the outer peripheral wall of the outer end of the joint pipe 120 in the length direction, so that the joint pipe 120 can be easily connected to the external pipeline. In a specific implementation, a plurality of fixing holes (for example, six or eight) are arranged on the flange ring.

[0056] In one embodiment, the sealing ring 520 is made of plastic or rubber.

[0057] In this embodiment, according to different usage scenarios, the sealing ring 520 selects a suitable material to achieve a superior usage effect in the relevant scenario while ensuring that the sealing effect can be achieved. Among them, when the sealing ring 520 is made of rubber material, it can provide a relatively superior soft sealing effect; and when it is made of plastic material, the sealing ring 520 can provide a certain hard sealing effect.

[0058] In one embodiment, the drive assembly 600 is connected to the valve stem 400 via a pin.

[0059] In this embodiment, a relatively simple method for fixing the drive assembly 600 is provided. For example, the drive assembly 600 includes a base and four drive bars 610 connected to the base. The base is connected to the valve stem 400 by pins, so that the entire drive assembly 600 is fixed.

[0060] In one embodiment, when the valve plate 200 is separated from the valve seat 130 to the maximum extent, the driving bar 610 is located in the guide groove 530 .

[0061] In this embodiment, within the entire range of movement of the valve stem 400, the drive bar 610 is not separated from the guide groove 530, so there is no need for alignment between the drive bar 610 and the guide groove 530, thus avoiding the occurrence of an abnormality.

[0062] In one embodiment, the width of the sealing ring assembly 500 is 2 to 5 centimeters.

[0063] In this embodiment, the preferred width of the sealing ring assembly 500 (the difference between the outer radius of the ring and the inner radius of the ring) is limited. The above size range can achieve a relatively superior sealing effect without causing excessive waste of materials.

[0064] In summary, the utility model provides a gate valve with optimized sealing, and the two sealing ring assemblies 500 are respectively sleeved on the inner ends of the two joint pipes 120 in the length direction. A guide groove 530 is respectively provided on the side of the support ring 510 away from the sealing ring 520 at the two sides of the joint pipe 120. The length direction of the guide groove 530 is consistent with the valve stem 400 and has an upward slope in the direction away from the valve cover 300; the wedge-shaped driving strip 610 on the driving assembly 600 cooperates with the guide groove 530 to realize the driving of the sealing ring assembly 500, and acts with the guide groove 530 in the absence of other power. When the valve plate 200 is combined with the valve seat 130, the driving strip 610 matches the guide groove 530 to press the sealing ring assembly 500 toward the valve plate 200, so that an auxiliary sealing effect is formed between the sealing ring assembly 500 and the valve plate 200; when the valve plate 200 moves, the sealing ring assembly 500 can clean the valve plate 200.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A gate valve with optimized sealing, characterized in that: include: A valve body, wherein a working cavity is arranged inside, and joint pipes are arranged at both ends of the valve body in the thickness direction, and the joint pipes extend into the working cavity to form a valve seat with a circular ring; The valve plate is arranged to correspond to the valve seat and has a uniform thickness in the area corresponding to the valve seat; A valve cover, connected to the valve body; A valve stem is movably mounted on the valve cover in a length direction, and an inner end of the valve stem is connected to the valve cover; Two sealing ring assemblies are respectively sleeved on the inner ends of the two joint pipes in the length direction, the sealing ring assemblies include a support ring and a sealing ring which are stacked and fixed on each other, the sealing ring is arranged corresponding to the valve plate, and a guide groove is respectively arranged on the side of the joint pipe on the side of the support ring away from the sealing ring, the length direction of the guide groove is consistent with the valve stem and has an upward slope in the direction away from the valve cover; A drive assembly is connected to the valve stem, and is provided with four wedge-shaped drive strips, wherein when the valve plate is combined with the valve seat, the drive strips match the guide grooves to press the sealing ring assembly toward the valve plate.

2. The seal-optimized gate valve according to claim 1, characterized in that: The outer wall of the inner end of the joint pipe in the length direction is in an outwardly expanded frustum shape.

3. The seal-optimized gate valve according to claim 2, characterized in that: The taper of the frustum-shaped portion of the joint pipe is between 1:20 and 1:

40.

4. The seal-optimized gate valve according to claim 1 or 2, characterized in that: The material of the valve plate is hard alloy.

5. The seal-optimized gate valve according to claim 1 or 2, characterized in that: An annular cleaning brush is respectively arranged on both sides of the valve plate in the thickness direction, wherein when the valve plate is combined with the valve seat, the cleaning brush is located at the outer periphery of the sealing ring assembly.

6. The seal-optimized gate valve according to claim 1 or 2, characterized in that: The free end ring of the joint pipe is provided with a fixing hole for connecting a bolt assembly.

7. The seal-optimized gate valve according to claim 1 or 2, characterized in that: The sealing ring is made of plastic or rubber.

8. The seal-optimized gate valve according to claim 1 or 2, characterized in that: The drive assembly is connected to the valve stem via a pin.

9. The seal-optimized gate valve according to claim 1 or 2, characterized in that: When the valve plate is separated from the valve seat to the maximum extent, the driving bar is located in the guide groove.

10. The seal-optimized gate valve according to claim 1 or 2, characterized in that: The width of the sealing ring assembly is 2 to 5 centimeters.

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