A dynamic seal gate valve

Abstract

The utility model belongs to valve technical field especially relates to a kind of dynamic sealing gate valve, comprising: valve body, valve body has flow passage and the door cavity that intersects with flow passage;Gate, gate is positioned in door cavity, and can be moved between the closed position of blocking fluid through flow passage and the open position of allowing fluid through flow passage;Further comprising: valve seat, valve seat is arranged in the flow passage of valve body and can cooperate with the panel of gate to form seal;Annular groove, annular groove is arranged in the radial outer surface of valve seat and is coaxially distributed with valve seat, annular groove is provided with axial sealing assembly;Radial passage, radial passage is opened on valve seat, radial passage has several and can directly transmit fluid pressure from passage to annular groove to be used for quickly activating axial sealing assembly. Wherein, axial sealing assembly can be bidirectional sealing, relative to prior art, the utility model effectively improves the sealing effect of gate valve.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and in particular relates to a dynamic sealing gate valve. Background Technology

[0002] A gate valve is an opening and closing element consisting of a gate. The direction of movement of the gate is perpendicular to the direction of fluid flow. Gate valves can only be fully open or fully closed; they cannot be used for regulation or throttling. Gate valves achieve sealing through the contact between the valve seat and the gate. For example, a self-positioning, anti-fouling flat gate valve disclosed in patent application number CN202421169473.X includes a valve body with a valve cavity and a medium channel communicating with the valve cavity. Left and right valve seats are respectively located at the intersection of the medium channel and the valve cavity. A gate is connected between the left and right valve seats, and the gate is sealed to the left and right valve seats. The gate is driven up and down by a valve stem. A spring hole is provided on the valve seat at the axial contact position with the valve body, and a spring is installed in the spring hole. A positioning block is provided coaxially with the gate in the valve body, and a positioning groove matching the positioning block is provided at the bottom of the gate. A scraper is installed in the valve body and arranged at the upper end of the valve seat, and the valve stem passes through the scraper. During use, the existing gate valves have slow sealing response speed, making them unable to quickly adapt to pressure changes. Furthermore, the accumulation of solid particles in the gate valve can easily lead to gate jamming. In addition, traditional gate valves are usually adjusted manually, which is slow. Some electromagnetically driven gate valves also have insufficient torque and cannot drive high-resistance valves. Therefore, it is necessary to make improvements. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned technical problems by providing a dynamic sealing gate valve, which effectively improves the sealing effect and operational stability of the gate valve.

[0004] In view of this, the present invention provides a dynamic sealing gate valve, comprising: A valve body having a flow channel and a cavity intersecting the flow channel; A gate, positioned within a cavity, movable between a closed position that blocks fluid from passing through a flow channel and an open position that allows fluid to pass through the flow channel; Also includes: A valve seat, which is disposed in the flow channel of the valve body and can cooperate with the panel of the gate to form a seal; An annular groove is provided on the radial outer surface of the valve seat and is coaxially distributed with the valve seat. An axial sealing assembly is provided in the annular groove. Radial channels, which are formed on the valve seat, have several radial channels and can transmit fluid pressure directly from the channels to the annular groove for rapid activation of the axial sealing assembly.

[0005] The axial sealing assembly can provide bidirectional sealing.

[0006] In this technical solution, during the use of the gate valve, the fluid pressure can be directly transmitted from the radial channel to the annular groove. At this time, the axial sealing component can be quickly activated under the action of fluid pressure and can adapt to changes in fluid pressure, effectively improving the sealing effect of the gate valve.

[0007] In the above technical solution, the axial seal further includes: The support seal has a one-way sealing part on both sides.

[0008] In the above technical solution, the one-way sealing part further includes: A cap ring is provided at the pressure end of the one-way seal. The cap ring has a transmission channel to directly transmit the fluid pressure transmitted to the annular groove through the radial channel to the one-way seal, thereby pushing the one-way seal to respond synchronously to the fluid pressure and expand outward.

[0009] In the above technical solution, the radial channel can be a continuous, uniformly wide radial opening groove that extends from the flow channel to the annular groove to form an unobstructed pressure transmission path.

[0010] Furthermore, the above technical solution also includes: An electromagnetic drive mechanism is disposed on the valve body. The electromagnetic drive mechanism includes an outer magnet assembly for generating a rotating magnetic field and an inner magnet element that is magnetically coupled to the outer magnet assembly and driven to rotate by the magnetic field. A gear transmission mechanism is disposed in the gate cavity and drives the gate to move between the closed position and the open position under the drive of the electromagnetic drive mechanism.

[0011] In the above technical solution, the gear transmission mechanism further includes: A first shaft is rotatably disposed in the gate cavity and connected to the gate; The second axis can rotate as the internal magnet element rotates; The second shaft is connected to the first shaft via a gear set.

[0012] In the above technical solution, the gear set can be a bevel gear set or a planetary gear set.

[0013] The beneficial effects of this utility model are: 1. The use of radial channels and axial sealing components can effectively improve the sealing effect of gate valves, and the sealing effect can adapt to changes in fluid pressure; 2. The radial channel can form a continuous, uniformly wide radial opening groove that extends from the flow channel to the annular groove, creating an unobstructed pressure transmission path. This effectively reduces the residence time of particles inside the fluid, prevents particle accumulation through fluid flushing, and improves the working stability of the gate valve. 3. The electromagnetic drive mechanism and gear transmission mechanism can quickly adjust the working state of the gate valve, and the gear set amplifies the electromagnetic drive force to meet the driving requirements of high-resistance gate valves. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the electromagnetic drive mechanism of this utility model.

[0017] Figure 3 This is a schematic diagram of the valve seat structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the axial sealing assembly of this utility model.

[0019] Figure 5 This is a schematic diagram of the combined structure of the valve seat and axial sealing assembly of this utility model.

[0020] The markings in the diagram are as follows: 1. Valve body; 100. Flow channel; 101. Gate cavity; 2. Gate; 3. Valve seat; 4. Annular groove; 5. Axial sealing assembly; 50. Support seal; 51. One-way sealing part; 510. Cap ring; 511. Transmission channel; 6. Radial channel; 7. Electromagnetic drive mechanism; 70. Outer magnet assembly; 71. Inner magnet element; 8. Gear transmission mechanism; 80. First shaft; 81. Second shaft; 82. Gear set; 9. Controller. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0023] In one embodiment of this application, a dynamic sealing gate valve includes: a valve body 1 having a flow channel 100 and a cavity 101 intersecting the flow channel 100; a gate 2 positioned in the cavity 101 and movable between a closed position blocking fluid from passing through the flow channel 100 and an open position allowing fluid to pass through the flow channel 100; and further includes: a valve seat 3 disposed in the flow channel 100 of the valve body 1 and capable of engaging with the panel of the gate 2 to form a seal; an annular groove 4 disposed on the radial outer surface of the valve seat 3 and coaxially distributed therewith, wherein an axial sealing assembly 5 is disposed in the annular groove 4; and radial channels 6 formed on the valve seat 3, having a plurality of radial channels 6 and capable of directly transmitting fluid pressure from the channels to the annular groove 4 for rapid activation of the axial sealing assembly 5. The axial sealing assembly 5 is capable of bidirectional sealing.

[0024] The axial seal also includes a support seal 50, which has a one-way sealing portion 51 on both sides.

[0025] The one-way sealing part 51 also includes a cap ring 510, which is disposed at the pressure end of the one-way sealing part 51. The cap ring 510 is provided with a transmission channel 511 to directly transmit the fluid pressure transmitted to the annular groove 4 through the radial channel 6 to the one-way seal, thereby pushing the one-way seal to respond synchronously to the fluid pressure and expand outward.

[0026] The valve body 1 has an upper valve surface and a lower valve surface. Additional components can be attached as needed to form a gate valve. The gate valve may include a first valve cover that is removably attached to the upper valve surface. The gate valve may also include a second cover that is attached to the lower valve surface. The centerline of the valve body 1 cavity 101 passes through the center of the valve body 1 and through the upper valve surface and the lower valve surface. The cavity 101 is symmetrical with respect to the centerline and is arranged perpendicular to the flow channel 100, thereby allowing the gate 2 to move within the valve body 1.

[0027] The valve body 1 also includes a seat pocket disposed within the flow channel 100 adjacent to the gate cavity 101. The seat pocket corresponds in shape to the valve seat 3, has a diameter, and is axially symmetrical about the centerline of the flow channel 100. The valve seat 3 is placed within the seat pocket. The valve body 1 has two seat pockets, the diameter of which is substantially proportional to that of the valve seat 3, so that the valve seat 3 is disposed and engaged within the seat pocket. An annular groove 4 is formed on a portion of the circumferential diameter of the outer surface of each valve seat 3. An axial sealing assembly 5 is located within the annular groove 4. The axial sealing assembly 5 includes a one-way sealing portion 51, which is activated by pressure to squeeze between the outer surfaces of the valve seat 3 and the valve body 1.

[0028] The support seal 50 may be made of polytetrafluoroethylene and is disposed between the one-way seal portions 51 to provide structural support, thereby preventing compression. The two cap rings 510 cooperate to amplify the responsive pressure of the one-way seal portions 51.

[0029] In this embodiment, during the use of the gate valve, the fluid pressure can be directly transmitted from the radial channel 6 to the annular groove 4. Then, the fluid pressure is transmitted to the one-way sealing part 51 through the transmission channel 511, thereby pushing the one-way sealing part 51 to expand outward and form a dynamic seal. The axial sealing component 5 can be quickly activated under the action of fluid pressure and adapt to changes in fluid pressure, effectively improving the sealing effect of the gate valve.

[0030] In another embodiment of the present invention, the radial channel 6 may be a continuous, uniformly wide radial opening groove that extends from the flow channel 100 to the annular groove 4 to form an unobstructed pressure transmission path.

[0031] In this embodiment, the radial channel 6 can be a continuous, uniformly wide radial opening groove that extends from the flow channel 100 to the annular groove 4 to form an unobstructed pressure transmission path. At the same time, the sealing pressure is synchronized with the fluid pressure. When the particles inside the fluid pass through the opening groove with the fluid, due to the continuity of the opening groove and the flushing effect of the fluid, the particles are difficult to be retained, which can effectively reduce the residence time of the particles inside the fluid. The flushing effect of the fluid prevents the accumulation of particles and improves the working stability of the gate valve.

[0032] In another embodiment of the present invention, it further includes: an electromagnetic drive mechanism 7, which is disposed on the valve body 1, and includes an outer magnet assembly 70 for generating a rotating magnetic field and an inner magnet element 71 that is magnetically coupled to the outer magnet assembly 70 and driven to rotate by the magnetic field; and a gear transmission mechanism 8, which is disposed in the gate cavity 101 and drives the gate 2 to move between the closed position and the open position under the drive of the electromagnetic drive mechanism 7.

[0033] The gear transmission mechanism 8 further includes: a first shaft 80, which is rotatably disposed in the gate cavity 101 and connected to the gate 2; and a second shaft 81, which can rotate with the rotation of the inner magnet element 71; wherein the second shaft 81 and the first shaft 80 are connected by a gear set 82.

[0034] The gear set 82 can be a bevel gear set 82 or a planetary gear set 82.

[0035] The outer magnet assembly 70 and inner magnet element 71 of the electromagnetic drive mechanism 7 are basically configured to include at least one electromagnet (such as an electromagnetic coil) and multiple permanent magnets (such as ferromagnets). When an electromagnet is activated (such as by current excitation), the magnetic force of the at least one electromagnet cooperates with the multiple permanent magnets to rotate the second shaft 81.

[0036] The electromagnetic drive mechanism 7 is installed in a housing connected to the valve body 1, which communicates with the door cavity 101. The housing is a hollow, substantially cylindrical component. One or more electromagnets are attached to the inner surface of the housing. In one embodiment, the housing and the one or more electromagnets serve as the stator of the system, while the second shaft 81 and the one or more permanent magnets serve as the rotor. The one or more electromagnets are connected to a controller 9 via one or more wires. The controller 9 is configured to supply current to the one or more electromagnets to excite them in order to apply magnetic force to the permanent magnets surrounding the second shaft 81. When current is supplied to the one or more electromagnets, the one or more electromagnets are configured to generate a rotating magnetic field, causing the multiple permanent magnets and the second shaft 81 to rotate under the influence of the rotating magnetic field, which is the cause of the rotation of the second shaft 81.

[0037] Taking the bevel gear set 82 as an example, one bevel gear can be installed in the valve cavity 101 of the valve body 1 through the buckle body, and the bevel gear is axially connected to the first shaft 80. The first shaft 80 can move linearly in the axial direction as the bevel gear rotates. The other bevel gear is connected to one end of the second shaft 81, and the two bevel gears mesh with each other.

[0038] In this embodiment, the electromagnetic drive mechanism 7 and the gear transmission mechanism 8 can be used to quickly adjust the working state of the gate valve, and the electromagnetic drive force can be amplified by the gear set 82 to meet the driving requirements of the high-resistance gate valve.

[0039] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A dynamic sealing gate valve, comprising: Valve body (1), the valve body (1) having a flow channel (100) and a cavity (101) intersecting the flow channel (100); Gate (2), which is positioned in the door cavity (101) and is movable between a closed position that blocks fluid from passing through the flow channel (100) and an open position that allows fluid to pass through the flow channel (100); Its characteristic is that it further includes: Valve seat (3), which is disposed in the flow channel (100) of the valve body (1) and can cooperate with the panel of the gate (2) to form a seal; An annular groove (4) is provided on the radial outer surface of the valve seat (3) and is coaxially distributed with the valve seat (3). An axial sealing assembly (5) is provided in the annular groove (4). Radial channels (6) are provided on valve seats (3). The radial channels (6) have a plurality of channels and can transmit fluid pressure directly from the channels to annular grooves (4) for rapid activation of axial sealing components (5). The axial sealing assembly (5) can provide bidirectional sealing.

2. The dynamic sealing gate valve according to claim 1, characterized in that, The axial sealing assembly also includes: A support seal (50) has a one-way sealing part (51) on both sides.

3. A dynamic sealing gate valve according to claim 2, characterized in that, The one-way sealing part (51) further includes: A cap ring (510) is provided at the pressure end of the one-way sealing part (51). The cap ring (510) is provided with a transmission channel (511) to directly transmit the fluid pressure transmitted through the radial channel (6) to the annular groove (4) to the one-way seal, thereby pushing the one-way seal to respond synchronously to the fluid pressure and expand outward.

4. A dynamic sealing gate valve according to claim 1, characterized in that: The radial channel (6) can be a continuous, uniformly wide radial opening groove that extends from the flow channel (100) to the annular groove (4) to form an unobstructed pressure transmission path.

5. A dynamic sealing gate valve according to claim 1, characterized in that, Also includes: An electromagnetic drive mechanism (7) is disposed on the valve body (1). The electromagnetic drive mechanism (7) includes an outer magnet assembly (70) for generating a rotating magnetic field and an inner magnet element (71) that is magnetically coupled to the outer magnet assembly (70) and driven to rotate by the magnetic field. A gear transmission mechanism (8) is provided in the gate cavity (101) and drives the gate (2) to move between the closed position and the open position under the drive of the electromagnetic drive mechanism (7).

6. A dynamic sealing gate valve according to claim 5, characterized in that, The gear transmission mechanism (8) further includes: The first shaft (80) is rotatably disposed in the gate cavity (101) and connected to the gate (2); The second axis (81) can rotate with the rotation of the inner magnet element (71); The second shaft (81) is connected to the first shaft (80) by a gear set (82).

7. A dynamic sealing gate valve according to claim 6, characterized in that: The gear set (82) may be a bevel gear set (82) or a planetary gear set (82).

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