Flat gate valve

Abstract

The utility model belongs to the technical field of gate valves, and particularly relates to a flat gate valve which comprises a valve body, a valve cover is arranged on the valve body, and a valve seat is arranged in the valve body. The valve rod is movably arranged on the valve cover in a penetrating manner; the gate plate is movably arranged in the valve body; the rack is arranged on the side wall of the valve rod and extends and is distributed in the axial direction of the valve rod; the transmission gear is rotationally arranged in the valve cover; the hand wheel is rotationally arranged on the side wall of the valve cover; the fixing piece is used for limiting the movement of the valve rod; the impact protection part is arranged on the surface of the gate plate and used for buffering medium impact; wherein the bottom end of the valve rod is connected with the flashboard, the hand wheel is in transmission connection with the transmission gear and can drive the transmission gear to rotate, the transmission gear is meshed with the rack, and compared with the prior art, the practicability of the flat gate valve is effectively improved, and the service life of the flat gate valve is effectively prolonged.

Description

Technical Field

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

[0002] A flat gate valve is a sliding valve with a parallel gate as its closing element. Its closing element can be a single gate or a double gate with an opening mechanism. The clamping force of the gate plate against the valve seat is controlled by the medium pressure acting on the floating gate plate or the floating valve seat. For example, a flat gate valve disclosed in patent application number CN201520126790.8 includes a valve body, a valve cover, a gate plate, a valve stem, a handwheel, and a valve seat. The valve body has a channel. The valve cover is fixedly connected to the valve body and forms a receiving cavity. The receiving cavity communicates with the channel. The lower part of the valve stem is connected to the gate plate, and the upper part of the valve stem is connected to the handwheel. The valve seat is fixedly connected to the valve body and located on both sides of the gate plate. It also includes a bracket, a sealing ring skeleton, and a limiting block. The valve cover has an axial receiving hole. The sealing ring skeleton is fitted on the valve stem and located in the axial receiving hole. The outer periphery and inner wall surface of the sealing ring skeleton have sealing grooves. The sealing grooves contain sealing rings. The bracket is fixedly connected to the upper part of the valve cover and abuts against the sealing ring skeleton. The limiting block is fixedly connected to the receiving cavity of the valve body. The outer periphery of the valve stem has a radial stop.

[0003] In operation, the existing flat gate valve uses a handwheel to rotate the valve stem and utilizes the threaded engagement on the stem for raising and lowering. This method of operation cannot provide efficient closure when the valve needs to be closed quickly, reducing its practicality. Furthermore, the gate of the flat gate valve is subjected to the impact of the medium for a long time, which can easily cause damage and reduce the service life of the valve. 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 flat gate valve to improve its practicality and service life.

[0005] In view of this, the present invention provides a flat gate valve, comprising:

[0006] A valve body, on which a valve cover is provided, and a valve seat is provided inside the valve body;

[0007] A valve stem, which is movably mounted on the valve cover;

[0008] A gate, which is movably disposed within the valve body;

[0009] Also includes:

[0010] A rack, which is disposed on the side wall of the valve stem and extends along the axial direction of the valve stem;

[0011] A transmission gear, which is rotatably disposed in the valve cover;

[0012] A handwheel, which is rotatably mounted on the side wall of the valve cover;

[0013] A retainer, the retainer being used to restrict the movement of the valve stem;

[0014] An impact protection component is disposed on the surface of the gate to buffer the impact of the medium.

[0015] The bottom end of the valve stem is connected to the gate, the handwheel is connected to the transmission gear and can drive the transmission gear to rotate, and the transmission gear meshes with the rack.

[0016] In this technical solution, during the use of the flat gate valve, the handwheel drives the transmission gear to rotate. The transmission gear meshes with the rack, thereby driving the valve stem to move up and down. The valve stem then drives the gate to open and close. The fixing component restricts the movement of the valve stem, thus fixing the gate in the open and closed positions. When the gate is in the open state and a situation arises where the gate needs to be closed quickly, the fixing component is released from the valve stem. Under the action of gravity, the gate can quickly fall and close the gate valve. At the same time, the closing speed of the gate can be further increased by cooperating with the handwheel. After the gate is closed, the impact protection component can effectively buffer the impact of the medium, thereby protecting the gate from damage caused by the impact of the medium. Compared with the prior art, this utility model effectively improves the practicality and service life of the flat gate valve.

[0017] In the above technical solution, the fastener further includes:

[0018] A pin seat is provided on the side wall of the valve cover and extends into the interior of the valve cover, and a main pin is movably inserted into the pin seat;

[0019] The valve stem has two sockets, which are distributed vertically on the valve stem. The positions of the two sockets correspond to the closed and open positions of the gate.

[0020] The insertion hole horizontally penetrates the valve stem, so a support hole that mates with the end of the main pin is provided on the inner wall of the valve cover.

[0021] In the above technical solution, the impact protection component further includes:

[0022] A buffer groove is provided on the surface of the gate plate, and a plurality of elastic telescopic rods are provided in the buffer groove;

[0023] A pressure plate, which is movably disposed in a buffer groove;

[0024] The end of the elastic telescopic rod is connected to the surface of the pressure plate.

[0025] Furthermore, the above technical solution also includes:

[0026] Several damping holes are evenly distributed along the circumference of the bearing plate at intervals on the edge of the bearing plate.

[0027] The damping orifice penetrates the pressure plate along the thickness direction of the pressure plate.

[0028] Furthermore, the above technical solution also includes:

[0029] The inner cavity is located in the pressure plate and is filled with several impact particles.

[0030] The beneficial effects of this utility model are:

[0031] 1. By changing the driving method of the valve stem through the rack and pinion and transmission gear, the gate can be closed quickly, which effectively improves the practicality of the flat gate valve;

[0032] 2. The inclusion of impact protection components can effectively improve the gate's impact resistance, reduce damage caused by media impact, and extend the service life of the flat gate valve.

[0033] 3. The damping holes and the addition of several impact particles can further improve the buffering performance of the pressure plate, thereby improving the impact resistance of the gate. Attached Figure Description

[0034] 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.

[0035] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present utility model.

[0036] Figure 2 This is a side view structural diagram of the present invention.

[0037] Figure 3 This is a schematic diagram of the internal structure of the valve cover of this utility model.

[0038] Figure 4 This is a schematic diagram of the gate structure of this utility model.

[0039] Figure 5 This is a schematic diagram of the impact protection component of this utility model.

[0040] The markings in the diagram are as follows:

[0041] 1. Valve body; 2. Valve cover; 3. Valve stem; 4. Gate; 5. Rack; 6. Transmission gear; 7. Handwheel; 8. Fixing component; 80. Pin seat; 81. Main pin; 82. Insertion hole; 9. Impact protection component; 90. Buffer groove; 91. Elastic telescopic rod; 92. Pressure plate; 93. Damping orifice; 94. Inner cavity; 95. Collision particles. Detailed Implementation

[0042] 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.

[0043] 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.

[0044] Example 1:

[0045] This application provides a flat gate valve, including: a valve body 1, a valve cover 2 disposed on the valve body 1, a valve seat disposed inside the valve body 1; a valve stem 3, which is movably disposed on the valve cover 2; and a gate 4, which is movably disposed in the valve body 1.

[0046] It also includes: rack 5, which is disposed on the side wall of valve stem 3 and extends along the axial direction of valve stem 3; transmission gear 6, which is rotatably disposed in valve cover 2; handwheel 7, which is rotatably disposed on the side wall of valve cover 2; fixing member 8, which is used to limit the movement of valve stem 3; and impact protection member 9, which is disposed on the surface of gate plate 4 to buffer the impact of the medium.

[0047] The bottom end of the valve stem 3 is connected to the gate plate 4, the handwheel 7 is connected to the transmission gear 6 and can drive the transmission gear 6 to rotate, and the transmission gear 6 meshes with the rack 5.

[0048] Furthermore, the valve cover 2 has a transmission chamber and a gate 4 movable chamber. The transmission chamber is located above the gate 4 movable chamber. The gate 4 movable chamber is connected to the inside of the valve body 1. The gate 4 can move up and down between the gate 4 movable chamber and the valve body 1. The gate 4 and the valve seat have a conventional sealing fit. The valve stem 3 and the valve cover 2 have a conventional movable fit. The main body of the rack 5 is located in the transmission chamber. The gear is installed in the transmission chamber in a conventional manner. The handwheel 7 is connected to the rotating shaft of the gear to drive the gear to rotate.

[0049] In this embodiment, during use, the flat gate valve is driven by the handwheel 7 to rotate the transmission gear 6. The transmission gear 6 meshes with the rack 5, thereby driving the valve stem 3 to move up and down. The valve stem 3 then drives the gate 4 to open and close. The fixing member 8 can restrict the movement of the valve stem 3, thereby fixing the gate 4 in the open and closed positions. When the gate 4 is in the open state and there is a situation where the gate valve needs to be closed quickly, the fixing member 8 is released from the restriction on the valve stem 3. Under the action of gravity, the gate 4 can fall quickly and close the gate valve. At the same time, the closing speed of the gate 4 can be further improved by cooperating with the handwheel 7. After the gate 4 is closed, the impact protection member 9 can effectively buffer the impact of the medium, thereby protecting the gate 4 from damage caused by the impact of the medium. Compared with the prior art, this utility model effectively improves the practicality and service life of the flat gate valve.

[0050] Example 2:

[0051] This embodiment provides a flat gate valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the fixing member 8 further includes: a pin seat 80, which is disposed on the side wall of the valve cover 2 and extends into the interior of the valve cover 2, and a main pin 81 is movably inserted into the pin seat 80; and two insertion holes 82, which are distributed vertically on the valve stem 3, and the positions of the two insertion holes 82 correspond to the closed position and the open position of the gate plate 4.

[0052] The insertion hole 82 horizontally penetrates the valve stem 3, so the inner wall of the valve cover 2 is provided with a support hole that mates with the end of the main pin 81.

[0053] In this embodiment, when the gate 4 is in the open position, the corresponding insertion hole 82 on the valve stem 3 is aligned with the pin seat 80. At this time, the main pin 81 is inserted into the pin seat 80 and continues to pass through the insertion hole 82. Finally, the end of the main pin 81 is inserted into the support hole, thereby fixing the valve stem 3 to restrict the movement of the gate 4. When closing the gate 4, the gate 4 can be lowered simply by pulling out the pin, which effectively improves the closing speed of the gate 4.

[0054] Example 3:

[0055] This embodiment provides a flat gate valve, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the impact protection component 9 further includes: a buffer groove 90, which is disposed on the surface of the gate plate 4, and a plurality of elastic telescopic rods 91 are disposed in the buffer groove 90; and a pressure plate 92, which is movably disposed in the buffer groove 90.

[0056] The end of the elastic telescopic rod 91 is connected to the surface of the pressure plate 92.

[0057] It also includes: a number of damping holes 93, which are evenly distributed along the circumference of the bearing plate 92 at intervals on the edge of the bearing plate 92;

[0058] Among them, the damping hole 93 penetrates the bearing plate 92 along the thickness direction of the bearing plate 92.

[0059] It also includes: an inner cavity 94, which is disposed in the pressure plate 92 and is filled with a number of impact particles 95.

[0060] Furthermore, several elastic telescopic rods 91 are evenly distributed in the buffer groove 90, and the axial direction of the elastic telescopic rods 91 is parallel to the axial direction of the valve body 1. The filling degree of several collision particles 95 in the inner cavity 94 is about 90%. The surface of the pressure plate 92 is provided with a filling port that communicates with the inner cavity 94, and a conventional sealing cap is installed on the filling port.

[0061] In this embodiment, when the gate 4 is impacted by the medium, the pressure plate 92 moves into the buffer groove 90 under the action of the medium impact and squeezes the elastic telescopic rod 91. After being compressed, the elastic telescopic rod 91 buffers the medium impact through elastic force. At the same time, a number of damping holes 93 can further buffer the medium impact through the fluid damping generated by the medium passing through the damping holes 93 during the movement of the pressure plate 92. In addition, when the pressure plate 92 moves under the action of the medium impact, the collision particles 95 in the inner cavity 94 of the pressure plate 92 can collide and rub against each other, thereby converting the impact force into heat energy for consumption, further reducing the impact of the medium impact on the gate 4. Compared with the prior art, this utility model can effectively improve the impact resistance of the gate 4, reduce the damage to the gate 4 caused by the medium impact, and improve the service life of the flat gate valve.

[0062] 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 flat gate valve, comprising: A valve body (1) is provided with a valve cover (2) and a valve seat is provided inside the valve body (1); Valve stem (3), which is movably mounted on valve cover (2); Gate (4), which is movably disposed in valve body (1); Its characteristic is that it further includes: A rack (5) is disposed on the side wall of the valve stem (3) and extends along the axial direction of the valve stem (3); A transmission gear (6) is rotatably disposed in the valve cover (2); A handwheel (7) is rotatably mounted on the side wall of the valve cover (2); A fixing member (8) is used to restrict the movement of the valve stem (3); Impact protection component (9), which is disposed on the surface of the gate (4) for buffering the impact of the medium; The bottom end of the valve stem (3) is connected to the gate (4), the handwheel (7) is connected to the transmission gear (6) and can drive the transmission gear (6) to rotate, and the transmission gear (6) meshes with the rack (5).

2. A flat gate valve according to claim 1, characterized in that, The fastener (8) also includes: A pin seat (80) is provided on the side wall of the valve cover (2) and extends into the interior of the valve cover (2). A main pin (81) is movably inserted into the pin seat (80). The two sockets (82) are distributed vertically on the valve stem (3), and the positions of the two sockets (82) correspond to the closed position and the open position of the gate (4); The insertion hole (82) horizontally penetrates the valve stem (3), so the inner wall of the valve cover (2) is provided with a support hole that matches the end of the main pin (81).

3. A flat gate valve according to claim 2, characterized in that, The impact protection component (9) also includes: A buffer groove (90) is provided on the surface of the gate (4), and a plurality of elastic telescopic rods (91) are provided in the buffer groove (90); A pressure plate (92) is movably disposed in a buffer groove (90); The end of the elastic telescopic rod (91) is connected to the surface of the pressure plate (92).

4. A flat gate valve according to claim 3, characterized in that, Also includes: Several damping holes (93) are evenly distributed along the circumference of the bearing plate (92) at the edge of the bearing plate (92); The damping hole (93) penetrates the pressure plate (92) along the thickness direction of the pressure plate (92).

5. A flat gate valve according to claim 4, characterized in that, Also includes: The inner cavity (94) is disposed in the pressure plate (92) and is filled with a number of collision particles (95).

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