Stop valve

Abstract

The utility model belongs to the technical field of valves, and particularly relates to a stop valve which comprises a valve body, a valve rod, a valve rod and a valve rod. The valve cover is arranged at the top end of the valve body and is detachably connected with the valve body through a bolt; the valve rod is arranged in the valve body, and a valve element matched with the valve seat is arranged at the bottom end of the valve rod; the hand wheel is arranged above the valve cover; the transmission part is arranged on the valve cover and used for connecting the hand wheel with the valve rod in a transmission mode, and the transmission part can reduce opening and closing torque by changing a transmission force arm of the hand wheel and the valve rod; the sealing element is arranged between the valve cover and the valve body, and the sealing element can perform sealing compensation; wherein the surface of the valve rod is provided with a transmission thread matched with the transmission part, the valve rod can be driven by the transmission part to drive the center line of the valve seat to do linear motion, and compared with the prior art, the use convenience of the stop valve and the sealing stability between the valve cover and the valve body of the stop valve are effectively improved.

Description

Technical Field

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

[0002] A gate valve, also known as a stop valve, is a type of forced-seal valve. The opening and closing element of a gate valve is a plug-shaped valve disc with a flat or conical sealing surface. The valve disc moves linearly along the centerline of the valve seat. The valve stem can also move in a rising and rotating manner. Gate valves can be used to control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. For example, a gate valve disclosed in patent application number CN202222835037.9 includes a mounting body with a flow channel, a valve stem mounted on the mounting body, a valve disc connected to the valve stem and located within the mounting body, and an actuator connected to the valve stem. The flow channel has two ends, each connected to a first pair of connecting pipes and a second pair of connecting pipes. Both the first and second pairs of connecting pipes are sealed and fixed to the mounting body. The first pair of connecting pipes has a first mating structure, and the second pair of connecting pipes has a second mating structure.

[0003] During use, the movement of the valve stem in this existing gate valve is affected by friction and the internal fluid pressure of the valve body, resulting in large opening and closing torques and difficulty in opening and closing. This reduces the ease of use of the gate valve, and the sealing stability between the valve cover and the valve body is poor, making leakage prone to occur. Therefore, it is necessary to make improvements. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a gate valve that improves the ease of use and sealing stability of the gate valve.

[0005] In view of this, the present invention provides a shut-off valve, comprising:

[0006] The valve body is provided with a flow channel and a valve seat;

[0007] A valve cover, which is disposed on the top of the valve body and detachably connected to the valve body by bolts;

[0008] A valve stem is disposed in the valve body, and a valve core that mates with a valve seat is disposed at the bottom end of the valve stem;

[0009] A handwheel, which is positioned above the valve cover;

[0010] Also includes:

[0011] A transmission component, which is mounted on the valve cover, is used to drive the handwheel and the valve stem. The transmission component can reduce the opening and closing torque by changing the transmission arm between the handwheel and the valve stem.

[0012] A sealing element is disposed between the valve cover and the valve body, and the sealing element can provide sealing compensation.

[0013] The valve stem has a transmission thread on its surface that mates with the transmission component, and the valve stem can move linearly along the center line of the valve seat under the drive of the transmission component.

[0014] In this technical solution, during the use of the gate valve, rotating the handwheel causes the valve stem to move linearly up and down via a transmission component. This, in turn, drives the valve core to cooperate with the valve seat to open and close the flow within the valve body. The transmission component can change the transmission arm between the handwheel and the valve stem, thereby effectively reducing the opening and closing torque and facilitating the linear movement of the valve stem. Even under high friction and high pressure, the user can easily rotate the handwheel to move the valve stem, effectively improving the ease of use of the gate valve. At the same time, the sealing component can provide sealing compensation, thereby effectively improving the sealing stability between the valve cover and the valve body of the gate valve.

[0015] In the above technical solution, the transmission component further includes:

[0016] The outer casing is located at the top of the valve cover, and a through hole for the valve stem to move is provided at the center of the upper surface of the outer casing;

[0017] A rotating disk is rotatably disposed in a housing. The center of the rotating disk is provided with an outer sleeve that is threadedly connected to the valve stem, and the edge of the rotating disk is provided with an inner toothed ring concentric with the rotating disk.

[0018] A transmission rod is rotatably mounted on the outer casing, and a transmission gear is provided at the bottom end of the transmission rod;

[0019] The top end of the transmission rod is connected to the handwheel, the transmission gear meshes with the internal gear ring, and the rotating disk is rotatably connected to the inner side wall of the outer casing via a bearing.

[0020] In the above technical solution, the sealing element further includes:

[0021] The sealing groove has two sections, which are respectively disposed on the valve cover and the valve body, and the sealing groove is in the form of a ring concentric with the valve stem;

[0022] A sealing ring body is disposed in a sealing groove, and the upper and lower sides of the sealing ring body are provided with lips;

[0023] An elastic ring is disposed in the lip and is concentrically distributed with the sealing ring body;

[0024] The upper lip of the sealing ring body has an inverted V-shaped cross-section, and the lower lip of the sealing ring body has a V-shaped cross-section.

[0025] In the above technical solution, the sealing element further includes:

[0026] Deformation groove, the deformation groove is provided on the side wall of the sealing ring body;

[0027] A T-shaped pressure ring is disposed in a deformation groove, and the belly of the T-shaped pressure ring is connected to the deformation groove;

[0028] The wings of the T-shaped pressure ring can move into the deformation groove when subjected to pressure.

[0029] Furthermore, the above technical solution also includes:

[0030] A lubricant storage box, wherein the lubricant storage box is disposed within the outer casing;

[0031] A lubricant absorber is disposed in a lubricant storage box;

[0032] The outer shell has an oil filling port that communicates with the lubricant storage box on its surface. The lubricant storage box has an extension port on its side wall. One end of the lubricant absorber extends through the extension port and contacts the drive thread on the valve stem.

[0033] The beneficial effects of this utility model are:

[0034] 1. By adjusting the transmission components, the power transmission arm between the handwheel and the valve stem can be changed, thereby effectively reducing the opening and closing torque and improving the ease of use of the gate valve.

[0035] 2. The sealing elements can effectively compensate for the seal automatically, improving the sealing stability between the valve cover and the valve body of the gate valve;

[0036] 3. The lubricant absorber effectively lubricates the transmission threads on the valve stem, reducing the friction force experienced by the valve stem during movement, further facilitating the movement of the valve stem, and improving the ease of use of the gate valve. Attached Figure Description

[0037] 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.

[0038] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0039] Figure 2This is a schematic cross-sectional view of the present invention.

[0040] Figure 3 This is a schematic diagram of the lubricant storage box structure of this utility model.

[0041] Figure 4 This is a schematic diagram of the main structure of the sealing ring of this utility model.

[0042] Figure 5 This is a schematic cross-sectional view of the sealing ring body of this utility model.

[0043] The markings in the diagram are as follows:

[0044] 1. Valve body; 100. Flow channel; 2. Valve seat; 3. Valve cover; 4. Valve stem; 5. Valve core; 6. Handwheel; 7. Transmission component; 70. Outer shell; 71. Rotating disc; 72. Outer sleeve; 73. Internal gear ring; 74. Transmission rod; 75. Transmission gear; 76. Bearing; 8. Seal; 80. Sealing groove; 81. Sealing ring body; 82. Lip; 83. Elastic ring; 84. Deformation groove; 86. T-shaped pressure ring; 9. Lubricant storage box; 10. Lubricant absorber; 11. Oil filler port. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] Example 1:

[0048] This application provides a shut-off valve, comprising: a valve body 1, wherein a flow channel 100 and a valve seat 2 are disposed within the valve body 1; a valve cover 3, wherein the valve cover 3 is disposed at the top of the valve body 1 and is detachably connected to the valve body 1 by bolts; a valve stem 4, wherein the valve stem 4 is disposed in the valve body 1, and a valve core 5 that cooperates with the valve seat 2 is disposed at the bottom end of the valve stem 4; and a handwheel 6, wherein the handwheel 6 is disposed above the valve cover 3;

[0049] It also includes: a transmission component 7, which is disposed on the valve cover 3 for drivingly connecting the handwheel 6 and the valve stem 4. The transmission component 7 can reduce the opening and closing torque by changing the transmission arm between the handwheel 6 and the valve stem 4; and a sealing component 8, which is disposed between the valve cover 3 and the valve body 1. The sealing component 8 can perform sealing compensation.

[0050] The valve stem 4 has a transmission thread on its surface that mates with the transmission component 7, and the valve stem 4 can move linearly along the center line of the valve seat 2 under the drive of the transmission component 7.

[0051] Furthermore, packing is installed between the valve stem 4 and the valve cover 3.

[0052] In this embodiment, during the use of the gate valve, rotating the handwheel 6 causes the valve stem 4 to move linearly up and down via the transmission component 7. This, in turn, drives the valve core 5 to cooperate with the valve seat 2 to open and close the flow within the valve body 1. The transmission component 7 can change the transmission arm between the handwheel 6 and the valve stem 4, thereby effectively reducing the opening and closing torque and facilitating the linear movement of the valve stem 4. Even under high friction and high pressure, the user can easily rotate the handwheel 6 to move the valve stem 4, effectively improving the ease of use of the gate valve. At the same time, the sealing component 8 can perform sealing compensation, thereby effectively improving the sealing stability between the valve cover 3 and the valve body 1 of the gate valve.

[0053] Example 2:

[0054] This embodiment provides a shut-off valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the transmission component 7 further includes: an outer shell 70, which is disposed at the top of the valve cover 3, and the center of the upper surface of the outer shell 70 is provided with a through hole for the valve stem 4 to move; a rotating disk 71, which is rotatably disposed in the outer shell 70, and the center of the rotating disk 71 is provided with an outer sleeve 72 that is threadedly connected to the valve stem 4, and the edge of the rotating disk 71 is provided with an internal toothed ring 73 concentric with the rotating disk 71; and a transmission rod 74, which is rotatably disposed on the outer shell 70, and the bottom end of the transmission rod 74 is provided with a transmission gear 75.

[0055] The top end of the transmission rod 74 is connected to the handwheel 6, the transmission gear 75 meshes with the internal gear ring 73, and the rotating disk 71 is rotatably connected to the inner wall of the outer casing 70 through the bearing 76.

[0056] In this embodiment, during the use of the gate valve, rotating the handwheel 6 causes the transmission gear 75 to rotate via the transmission rod 74. The rotation of the transmission gear 75, in turn, causes the internal gear ring 73 meshing with it to rotate. As the internal gear ring 73 rotates, the rotating disk 71 rotates, causing the outer sleeve 72 to rotate as well. Since the valve stem 4 is threadedly connected to the outer sleeve 72, the valve stem 4 moves up and down in a linear motion as the outer sleeve 72 rotates, causing the valve core 5 to cooperate with the valve seat 2 to open and close the flow in the valve body 1. Compared with the prior art, this utility model connects the valve stem 4 and the handwheel 6 through the transmission component 7, which can change the transmission arm between the handwheel 6 and the valve stem 4, thereby effectively reducing the opening and closing torque and facilitating the linear movement of the valve stem 4. Even under high friction and high pressure, the user can easily rotate the handwheel 6 to move the valve stem 4, effectively improving the ease of use of the gate valve.

[0057] Example 3:

[0058] This embodiment provides a shut-off valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the sealing element 8 further includes: a sealing groove 80, which has two grooves and is respectively disposed on the valve cover 3 and the valve body 1, and the sealing groove 80 is annular and concentric with the valve stem 4; a sealing ring body 81, which is disposed in the sealing groove 80, and the upper and lower sides of the sealing ring body 81 are provided with lips 82; and an elastic ring 83, which is disposed in the lips 82 and is concentrically distributed with the sealing ring body 81.

[0059] The lip 82 at the upper part of the sealing ring body 81 has an inverted V-shaped cross section, and the lip 82 at the lower part of the sealing ring body 81 has a V-shaped cross section.

[0060] The sealing element 8 further includes: a deformation groove 84, which is disposed on the side wall of the sealing ring body 81; and a T-shaped pressure ring 86, which is disposed in the deformation groove 84 and the belly of the T-shaped pressure ring is connected to the deformation groove 84.

[0061] The wings of the T-shaped pressure ring can move into the deformation groove 84 when subjected to pressure.

[0062] In this embodiment, during the installation process, the upper and lower lips 82 of the sealing ring body 81 are embedded in the sealing groove 80 and can be squeezed by the sealing groove 80 to form a sealing surface. At the same time, after the lip 82 is compressed, the elastic ring 83 is also compressed and generates elastic force. The elastic force of the elastic ring 83 provides sealing compensation for the sealing surface formed by the lip 82, effectively improving the sealing stability of the sealing element 8. Meanwhile, during the operation of the sealing ring body 81, when the medium moves to the sealing ring body 81, the pressure generated by the medium will act on the wings of the T-shaped pressure ring, thereby pressing the wings into the deformation groove 84. During the pressing process, the wings of the T-shaped pressure ring 86 will simultaneously squeeze the deformation groove 84, causing the sealing ring body 81 to expand to the upper and lower sides for sealing compensation, thereby further improving the sealing performance of the sealing surface. Compared with the prior art, this utility model effectively improves the sealing stability between the valve cover 3 and the valve body 1 of the gate valve.

[0063] Example 4:

[0064] This embodiment provides a shut-off valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including: a lubricant storage box 9, which is disposed in the outer shell 70; and a lubricant absorber 10, which is disposed in the lubricant storage box 9.

[0065] The outer shell 70 has an oil filling port 11 that communicates with the lubricant storage box 9 on its surface. The lubricant storage box 9 has an extension port on its side wall. One end of the lubricant absorber 10 extends out of the extension port and contacts the transmission thread on the valve stem 4.

[0066] Furthermore, a conventional cap can be installed on the oil filler 11 to close the oil filler 11, and the lubricant absorber 10 is made of conventional oil-absorbing material such as felt or oil-absorbing cotton.

[0067] In this embodiment, during the use of the shut-off valve, lubricant is added to the lubricant storage box 9 through the oil filling port 11. After entering the lubricant storage box 9, the lubricant is absorbed by the lubricant absorber 10 and spreads within the lubricant absorber 10. Through the contact between the lubricant absorber 10 and the transmission thread on the valve stem 4, the lubricant can be applied to the valve stem 4, effectively reducing the friction force during the movement of the valve stem 4, further facilitating the movement of the valve stem 4, and improving the ease of use of the shut-off valve.

[0068] 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 shut-off valve, comprising: Valve body (1), wherein a flow channel (100) and a valve seat (2) are provided inside the valve body (1); Valve cover (3), which is disposed on the top of valve body (1) and detachably connected to valve body (1) by bolts; Valve stem (4), the valve stem (4) is disposed in valve body (1), and the bottom end of the valve stem (4) is provided with valve core (5) that cooperates with valve seat (2); Handwheel (6), said handwheel (6) is disposed above valve cover (3); Its characteristic is that it further includes: Transmission component (7), which is mounted on valve cover (3) for driving connection between handwheel (6) and valve stem (4), and the transmission component (7) can reduce the opening and closing torque by changing the transmission arm between handwheel (6) and valve stem (4); A sealing element (8) is disposed between the valve cover (3) and the valve body (1), and the sealing element (8) can provide sealing compensation; The valve stem (4) has a transmission thread on its surface that cooperates with the transmission component (7), and the valve stem (4) can move linearly along the center line of the valve seat (2) under the drive of the transmission component (7).

2. A shut-off valve according to claim 1, characterized in that, The transmission component (7) also includes: The outer casing (70) is located at the top of the valve cover (3), and the center of the upper surface of the outer casing (70) is provided with a through hole for the valve stem (4) to move. Rotary disk (71), the rotating disk (71) is rotatably disposed in the outer shell (70), the center of the rotating disk (71) is provided with an outer sleeve (72) threadedly connected to the valve stem (4), and the edge of the rotating disk (71) is provided with an inner toothed ring (73) concentric with the rotating disk (71); A transmission rod (74) is rotatably mounted on the outer casing (70), and a transmission gear (75) is provided at the bottom end of the transmission rod (74); The top end of the transmission rod (74) is connected to the handwheel (6), the transmission gear (75) meshes with the internal gear ring (73), and the rotating disk (71) is rotatably connected to the inner wall of the outer shell (70) through a bearing (76).

3. A shut-off valve according to claim 2, characterized in that, The seal (8) also includes: The sealing groove (80) has two and is respectively provided on the valve cover (3) and the valve body (1). The sealing groove (80) is an annular shape concentric with the valve stem (4). A sealing ring body (81) is provided in a sealing groove (80), and the upper and lower sides of the sealing ring body (81) are provided with lips (82); An elastic ring (83) is disposed in the lip (82) and concentrically distributed with the sealing ring body (81); The upper lip (82) of the sealing ring body (81) has an inverted V-shaped cross section, and the lower lip (82) of the sealing ring body (81) has a V-shaped cross section.

4. A shut-off valve according to claim 3, characterized in that, The seal (8) also includes: Deformation groove (84) is provided on the side wall of the sealing ring body (81); T-shaped pressure ring (86), the T-shaped pressure ring is disposed in the deformation groove (84), and the belly of the T-shaped pressure ring is connected to the deformation groove (84); The wing of the T-shaped pressure ring can move into the deformation groove (84) when subjected to pressure.

5. A shut-off valve according to claim 2, characterized in that, Also includes: A lubricant storage box (9) is disposed in the outer casing (70); A lubricant absorber (10) is disposed in a lubricant storage box (9); The outer shell (70) has an oil filling port (11) that communicates with the lubricant storage box (9) on its surface. The side wall of the lubricant storage box (9) has an extension port. One end of the lubricant absorber (10) extends out of the extension port and contacts the transmission thread on the valve stem (4).

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