Gate valve with elastic opening and closing

Abstract

The utility model discloses a gate valve that utilizes the elasticity to open and close, contains a valve body, a transmission seat, two gate plates and a elastic piece. The valve body has a chamber, a locating plate and two valve ports between the chamber and the locating plate, the gate plates are arranged on the two sides of the transmission seat and are connected together by the elastic piece, the elastic piece is arranged on the transmission seat and has an elastic locating part protruding from the transmission seat, when the transmission seat is located at the first position, the gate plates are located in the chamber and are close to each other by the elastic force of the elastic piece, so that the valve ports are opened, when the transmission seat is located at the second position, the gate plates seal the valve ports and are buffered and positioned by the elastic locating part of the elastic piece abutting against the locating plate of the valve body. Therefore, the gate valve of the utility model utilizes the elastic force of the elastic piece to achieve the opening and closing effect, and has the characteristics of smooth operation, simple structure and good adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to a gate valve, in particular to a gate valve which is opened and closed by elastic force. BACKGROUND

[0002] The vacuum valve disclosed in the patent case CN 107923554 A is provided with a first plate and a second plate which are driven by a roller support when the roller support moves from an open position to an intermediate position; when the roller support moves from the intermediate position to a closed position, further movement of the first plate and the second plate in the moving direction is locked, and the first expansion roller and the second expansion roller move along the concave edge, and in this case, the first plate and the second plate are separated from each other in parallel to the expansion direction, wherein the first plate and the second plate are pressed against the first expansion roller and the second expansion roller by a first spring arm arranged on the first plate and a second spring arm arranged on the second plate.

[0003] The double-sealing gate valve disclosed in the patent case CN 204267768 U is provided with a driving shaft which continuously pushes a driving frame when the sealing gate is closed, and a rolling bearing is brought from a deep stop section to a shallow slope section, so that the distance between the two sealing gates is increased, thereby keeping the sealing state between the sealing gate and the valve hole; on the contrary, when the driving shaft reverses, the rolling bearing is brought from the shallow slope section to the deep stop section, and the elastic restoring force of the elastic member is used to reduce the distance between the two sealing gates, thereby releasing the sealing state between the sealing gate and the valve hole.

[0004] However, the two patent documents have the problems of unsmooth gate actuation, complex component structure and high manufacturing cost, and in addition, the two patent documents have fixed sealing strength, and it is difficult to adjust the restoring force of the elastic member according to actual needs (such as different specifications and sizes), so the adaptability is poor. SUMMARY

[0005] The main purpose of the present application is to provide a gate valve which is opened and closed by elastic force, and has smooth actuation, simple structure, low manufacturing cost and good adaptability.

[0006] To achieve the above main purpose, the gate valve of the present application comprises a valve body and a gate plate unit. The valve body has a chamber, a positioning plate and two valve ports, the valve ports are communicated with the chamber and located between the chamber and the positioning plate; the gate plate unit has a transmission seat, two gate plates and at least one elastic member, the transmission seat is arranged in the valve body and can reciprocate between a first position and a second position, the two gate plates are arranged on the opposite sides of the transmission seat and connected together through the at least one elastic member, so that the two gate plates are close to each other under the elastic force of the at least one elastic member, the at least one elastic member is arranged on the transmission seat and has an elastic positioning part protruding from the transmission seat, when the transmission seat is located at the first position, the two gate plates and the at least one elastic member are located in the chamber of the valve body, so that the valve ports of the valve body are opened, when the transmission seat is located at the second position, the two gate plates seal the valve ports of the valve body, and the elastic positioning part of the at least one elastic member abuts against the positioning plate of the valve body to serve as a buffer positioning.

[0007] As can be seen from the above, the gate valve of the present application can adjust the rebound force of the elastic member according to actual needs, so the performance in adaptability is better; in addition, the gate plate provided by the present application is smoother in operation, so the operation efficiency can be improved, and since the constituent members are relatively simple, the purpose of reducing manufacturing cost can be achieved.

[0008] Preferably, the number of the elastic member is one, and the elastic member further has two opposite elastic parts, one end of the elastic parts is connected to the two gate plates, and the other end of the elastic parts is connected to the elastic positioning part. In this way, when the transmission plate is located at the first position, the elastic member provides the rebound force to the two gate plates through the elastic parts, and when the transmission plate is located at the second position, the elastic parts of the elastic member are stretched by the two gate plates to accumulate the rebound force of the elastic member.

[0009] Preferably, each of the elastic parts has a first arm segment and a second arm segment connected to the first arm segment, one end of the first arm segments is connected to the two gate plates, and two ends of the second arm segments are respectively connected to the first arm segments and the elastic positioning part. In addition, the width of the first arm segments is greater than the width of the second arm segments, so that the same elastic part has different elastic coefficients.

[0010] Preferably, the two opposite sides of the transmission seat respectively have a transmission protrusion, the second arm segments of the elastic parts of the elastic member have a long hole adjacent to the elastic positioning part, and the transmission protrusions of the transmission seat are movably embedded in the long holes. In this way, when the transmission seat moves from the first position to the second position, the transmission seat drives the elastic member through the transmission protrusions, and then drives the two gate plates through the elastic member.

[0011] Preferably, the number of elastic members is at least two, each of the elastic members further has two opposite elastic portions, one end of the elastic portions of each of the elastic members is connected to the gate plates, and the other end of the elastic portions of each of the elastic members is connected to the elastic positioning portion. In addition, the length of the elastic portions of one of the elastic members is greater than the length of the elastic portions of the other of the elastic members, so that the elastic portions of the elastic members have different elastic coefficients.

[0012] Preferably, the two opposite sides of the transmission seat each has a transmission protrusion, one of the elastic members has a long hole adjacent to the elastic positioning portion, and the long holes are sleeved on the transmission protrusions of the transmission seat. In this way, when the transmission seat moves from the first position to the second position, the transmission seat drives the elastic members with the transmission protrusions, and then the elastic members drive the gate plates.

[0013] Preferably, the gate plate unit further has two balls, the balls are arranged on the two opposite sides of the transmission seat, each of the gate plates has a rolling groove toward one side of the transmission seat, the rolling groove has a first section and a second section connected to the first section, and the depth of the first section is greater than the depth of the second section. In this way, when the transmission seat moves from the first position to the second position, the balls are driven from the first sections with greater depth to the second sections with smaller depth, so that the balls push the gate plates outward to increase the distance between the gate plates, thereby sealing the valve ports; conversely, when the transmission seat moves from the second position to the first position, the balls are driven from the second sections with smaller depth to the first sections with greater depth, so that the balls release the pushing force applied to the gate plates, and the gate plates are released from the sealing relationship with the valve ports by the elastic force of the elastic members.

[0014] Preferably, the valve body is provided with a fluid cylinder, the fluid cylinder is arranged in the chamber with a driving shaft connected to the transmission seat, for driving the transmission seat to reciprocate between the first position and the second position.

[0015] The detailed structure, features, assembly or use of the gate valve provided by the present application will be described in the following detailed description of the embodiments. However, those skilled in the art should understand that the detailed description and the specific examples of implementing the present application are only used to illustrate the present application, and are not used to limit the patent scope of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the gate valve of the first embodiment of the present application, in which the valve port is in an open state.

[0017] Figure 2 It is a partial perspective exploded view of the gate valve of the first embodiment of the present application.

[0018] Figure 3 A perspective exploded view of the gate unit provided for the gate valve of the first embodiment of the present invention.

[0019] Figure 4 A front view partial cross-sectional view of the gate valve of the first embodiment of the present invention, in which the transmission seat is located at the first position.

[0020] Figure 5 A side view partial cross-sectional view of the gate valve of the first embodiment of the present invention, in which the ball is located at the first section of the rolling groove.

[0021] Figure 6 A front view partial cross-sectional view of the gate valve of the first embodiment of the present invention, in which the transmission seat is located at the second position.

[0022] Figure 7 A side view partial cross-sectional view of the gate valve of the first embodiment of the present invention, in which the ball is located at the second section of the rolling groove.

[0023] Figure 8 A perspective view of the gate valve of the first embodiment of the present invention, in which the valve port is in a sealing state.

[0024] Figure 9 A perspective exploded view of the gate unit provided for the gate valve of the second embodiment of the present invention.

[0025] Figure 10 A front view partial cross-sectional view of the gate valve of the first embodiment of the present invention, in which the transmission seat is located at the first position.

[0026] In the drawings:

[0027] 10: gate valve

[0028] 20: valve body

[0029] 21: top frame

[0030] 22: side plate

[0031] 23: chamber

[0032] 24: valve port

[0033] 25: annular plate

[0034] 26: top plate

[0035] 262: screw

[0036] 27: shaft hole

[0037] 28: cylinder seat

[0038] 29: positioning plate

[0039] 30: fluid pressure cylinder

[0040] 32: cylinder body

[0041] 34: drive shaft

[0042] 40: shutter unit

[0043] 42: transmission seat

[0044] 44: hollow groove

[0045] 46: ball

[0046] 48: transmission member

[0047] 50: transmission convex portion

[0048] 52: guide wheel

[0049] 54: bearing

[0050] 56: shutter

[0051] 58: rolling groove

[0052] 60: first section

[0053] 62: second section

[0054] 64: counterbore

[0055] 66: elastic assembly

[0056] 68a-68c: elastic member

[0057] 70: elastic portion

[0058] 72: elastic positioning portion

[0059] 74: long hole

[0060] 76: support plate

[0061] 762: screw

[0062] 764: screw

[0063] 766: nut

[0064] P1: first position

[0065] P2: second position

[0066] 80: elastic member

[0067] 81: elastic portion

[0068] 82: first arm section

[0069] 83: second arm section

[0070] 84: elastic positioning portion

[0071] 85: long hole DETAILED DESCRIPTION

[0072] First, it is explained that in the entire specification, including the embodiments to be described below and the claims, the terms related to directions are based on the directions in the drawings. Second, in the embodiments to be described below and the drawings, the same reference numerals represent the same or similar elements or structural features.

[0073] Referring to Figures 1 to 3 , the gate valve 10 of the present application comprises a valve body 20, a fluid pressure cylinder 30, and a gate plate unit 40.

[0074] As shown in Figure 1 and Figure 2 , the valve body 20 has a top frame 21, two side plates 22, two annular plates 25, a top plate 26, a cylinder seat 28, and a positioning plate 29. The top ends of the side plates 22 are connected to the top frame 21, so that a hollow chamber 23 is formed between the side plates 22 and the top frame 21. The bottom ends of the side plates 22 each have a valve port 24 that communicates with the chamber 23. The annular plates 25 are connected to the outer circumferential surfaces of the side plates 22 and surround the valve ports 24. The top plate 26 is connected to the top frame 21 by a plurality of screws 262, so as to close the top opening of the chamber 23. The center of the top plate 26 has a shaft hole 27 that communicates with the chamber 23. The cylinder seat 28 is fixed to the top surface of the top plate 26 and covers the shaft hole 27 of the top plate 26. The positioning plate 29 is connected to the bottom ends of the side plates 22 and is located adjacent to the valve ports 24, so that the valve ports 24 are located between the chamber 23 and the positioning plate 29.

[0075] The fluid pressure cylinder 30 can be a pneumatic cylinder or a hydraulic cylinder, which is not limited herein. The fluid pressure cylinder 30 has a cylinder body 32 and a driving shaft 34. The cylinder body 32 is connected to the top surface of the cylinder seat 28. The driving shaft 34 is arranged to be vertically displaceable in the cylinder body 32 and extends into the chamber 23 through the shaft hole 27 of the top plate 26 (as shown in Figure 6 ).

[0076] The gate plate unit 40 is arranged in the valve body 20 and has a transmission seat 42, two gate plates 56, and an elastic assembly 66, as shown in Figure 3 , wherein:

[0077] The transmission seat 42 is a rectangular frame. The central part of the transmission seat 42 has a hollow groove 44, and a plurality of balls 46 (the number and position of the balls 46 can be adjusted according to actual needs, which are not limited here) are arranged on the front and rear sides of the transmission seat 42 around the hollow groove 44. The top end of the transmission seat 42 is connected to the bottom end of the drive shaft 34 of the fluid pressure cylinder 30, so that the transmission seat 42 can be driven to move up and down reciprocally by the drive shaft 34. The bottom end of the transmission seat 42 is penetrated by a transmission member 48, and the two ends of the transmission member 48 respectively have a transmission protrusion 50 protruding from the front and rear sides of the transmission seat 42. In addition, two upper and lower guide wheels 52 are respectively arranged on the left and right sides of the transmission seat 42, and a bearing 54 is respectively arranged at the four corners of the transmission seat 42. The guide wheels 52 and the bearings 54 respectively abut against the side plates 22 of the valve body 20, so that the stability and smoothness of the transmission seat 42 when moving up and down can be increased by the arrangement of the guide wheels 52 and the bearings 54.

[0078] The two gate plates 56 are located on the front and rear opposite sides of the transmission seat 42. Each gate plate 56 has a plurality of longitudinally extending rolling grooves 58 towards one side of the transmission seat 42, and the rolling grooves 58 accommodate the balls 46 in a one-to-one manner. Each rolling groove 58 has a first section 60 and a second section 62 connected to the bottom end of the first section 60. The depth of the first section 60 is greater than the depth of the second section 62 (as shown in Figs. 6 and 7). Figure 4 and Figure 6 It should be noted that the number and position of the rolling grooves 58 can be adjusted according to actual needs, as long as they can correspond to the number and position of the balls 46.

[0079] The elastic assembly 66 has three elastic members 68a, 68b, 68c in this embodiment. Each elastic member 68a, 68b, 68c has two opposite elastic parts 70 and an elastic positioning part 72 integrally connected to the bottom end of the elastic parts 70. The length of the elastic parts 70 of the middle elastic member 68b is greater than the length of the elastic parts 70 of the left and right elastic members 68a, 68c, so that the elastic parts 70 of the elastic members 68a, 68b, 68c have different elastic coefficients. The bottom end of each elastic part 70 of the middle elastic member 68b has a long hole 74 adjacent to the elastic positioning part 72. The elastic assembly 66 further has two support plates 76. One of the support plates 76 is fixed to the top end of one of the elastic parts 70 of the elastic members 68a, 68b, 68c and one of the gate plates 56 by four screws 762. The other support plate 76 is fixed to the top end of the other elastic part 70 of the elastic members 68a, 68b, 68c by four screws 764 and four screw nuts 766. The heads of the screws 764 are fixed in the four counterbores 64 of the other gate plate 56, so that the two gate plates 56 are combined together by the elastic assembly 66. In addition,Figure 3 and Figure 4 As shown, the elastic elements 68a, 68b, and 68c are sleeved on the transmission base 42 from bottom to top, with a portion located in the hollow groove 44. The elastic positioning part 72 of the middle elastic element 68b protrudes from below the transmission base 42. In addition, the elongated holes 74 of the middle elastic element 68b are sleeved on the transmission protrusions 50 of the transmission element 48, so that the transmission base 42 can drive the elastic component 66 during the up and down displacement, and the elastic component 66 can then drive the gate 56.

[0080] In actual operation, firstly as Figure 1 and Figure 4 As shown, the drive shaft 34 of the fluid cylinder 30 holds the transmission seat 42 in the position as follows: Figure 4 and Figure 5 In the first position P1 shown, the gates 56 and the elastic components 66 are both located in the chamber 23, so that the valve ports 24 are in an open state.

[0081] To close the valve ports 24, the drive shaft 34 of the fluid cylinder 30 drives the transmission seat 42 from the position indicated by the valve port 24. Figure 4 and Figure 5 The first position P1 shown descends to the following position: Figure 6 and Figure 7 In the second position P2 shown, during the descent, the transmission seat 42 synchronously drives the gates 56 to descend via the elastic component 66. When the elastic positioning part 72 of the intermediate elastic member 68b abuts against the positioning plate 29, a buffer positioning effect is generated to absorb the impact force applied to the valve body 20 by the gate unit 40. At this time, the gates 56 are directly opposite the valve ports 24.

[0082] When the gate 56 is aligned with the valve port 24, the drive shaft 34 of the fluid cylinder 30 continues to push the transmission seat 42. At this time, the balls 46 are carried from the deeper first section 60 to the shallower second section 62. When the transmission seat 42 reaches the... Figure 6 and Figure 7 In the second position P2 shown, the ball bearing 46 pushes the gates 56 outward, increasing the distance between the gates 56, thereby sealing the valve ports 24 (e.g., Figure 8When the driving shaft 34 of the fluid cylinder 30 is actuated, the ball 46 will be brought from the second section 62 to the first section 60, so as to release the pushing force applied to the gate plates 56, and the elastic restoring force of the elastic parts 70 of the elastic members 68a, 68b, 68c will make the gate plates 56 close to each other and reduce the distance between them, so as to release the sealing effect between the gate plates 56 and the valve ports 24. Until the ball 46 is clamped in the first section 60, the gate plates 56 can be brought to the first position P1 as shown in Figure 4 and Figure 5 shown, so as to open the valve ports 24 as shown in Figure 1 .

[0083] On the other hand, the structure and number of the elastic members can be changed according to actual needs. As shown in Figure 9 and Figure 10 , in the second embodiment of the present application, the elastic assembly 66 has only one elastic member 80, which has two opposite elastic parts 81 and an elastic positioning part 84. Each elastic part 81 has a first arm section 82 and a second arm section 83, the top end of the second arm section 83 is integrally connected to the bottom end of the first arm section 82, the bottom end of the second arm section 83 is integrally connected to the elastic positioning part 84, and the bottom end of the second arm section 83 has a long hole 85 adjacent to the elastic positioning part 84. In addition, the width of the first arm section 82 is greater than the width of the second arm section 83, so that the same elastic part 81 has different elastic coefficients. Figure 9 and Figure 10 , in the second embodiment of the present application, the elastic assembly 66 also has two support plates 76. One support plate 76 is fixed to the top end of the first arm section 82 of one elastic part 81 and one gate plate 56 by four screws 762, and the other support plate 76 is fixed to the top end of the first arm section 82 of the other elastic part 81 by four screws 764 and four nuts 766. The heads of the screws 764 are fixed in the four counterbores 64 of the other gate plate 56. In this way, the elastic assembly 66 can combine the gate plates 56 together, and provide elastic restoring force to the gate plates 56 by the elastic parts 81 with different elastic coefficients.

[0084] In summary, the gate valve 10 of the present application can adjust the number of elastic members 68a, 68b, 68c, 80 according to actual needs (e.g. different sizes), and utilize different elastic coefficient structure designs, and further correspondingly adjust the rebound force provided by the elastic members 68a, 68b, 68c, 80, so that the performance in adaptability is better. In addition, the gate plate 56 provided by the present application is smoother in actuation, so that the work efficiency can be improved, and the overall component is relatively simple, so that the purpose of reducing manufacturing cost can be achieved.

[0085] Of course, the present application can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application. However, these corresponding changes and modifications should all belong to the protection scope of the claims of the present application.

Claims

1. A gate valve which is opened and closed by elastic force, characterized by comprising: The valve body has a chamber, a locating plate and two valve ports, the valve ports are communicated with the chamber and located between the chamber and the locating plate; and The gate plate unit has a transmission seat, two gate plates and at least one elastic member, the transmission seat is arranged in the valve body and can reciprocate relative to the valve body between a first position and a second position, the gate plates are arranged on two opposite sides of the transmission seat and connected together by the at least one elastic member, so that the gate plates are close to each other by the elastic force provided by the at least one elastic member, the at least one elastic member is arranged on the transmission seat and has an elastic locating part protruding from the transmission seat, when the transmission seat is located at the first position, the gate plates and the at least one elastic member are located in the chamber of the valve body, so that the valve ports of the valve body are opened, when the transmission seat is located at the second position, the gate plates seal the valve ports of the valve body, and the elastic locating part of the at least one elastic member abuts against the locating plate of the valve body; Wherein, the at least one elastic member further has two opposite elastic parts, one end of the elastic part is connected to the gate plate, and the other end of the elastic part is connected to the elastic locating part; Wherein, the elastic parts have different elastic coefficients; Wherein, the gate plate unit has the elastic member, the elastic part has a first arm segment and a second arm segment connected to the first arm segment, one end of the first arm segment is connected to the gate plate, and two ends of the second arm segment are respectively connected to the first arm segment and the elastic locating part, and the width of the first arm segment is greater than the width of the second arm segment; Wherein, the cross-sectional shape of the elastic locating part is arc-shaped. The two opposite sides of the transmission seat respectively have a transmission protrusion, the second arm segment of each elastic part of the elastic member has a long hole adjacent to the elastic locating part, and the long hole is slidably sleeved on the transmission protrusion.

2. The gate valve of claim 1, wherein, The valve body has a chamber, a locating plate and two valve ports, the valve ports are communicated with the chamber and located between the chamber and the locating plate; and 3. A gate valve which is opened and closed by elastic force, characterized by The gate plate unit has a transmission seat, two gate plates and at least one elastic member, the transmission seat is arranged in the valve body and can reciprocate relative to the valve body between a first position and a second position, the gate plates are arranged on two opposite sides of the transmission seat and connected together by the at least one elastic member, so that the gate plates are close to each other by the elastic force provided by the at least one elastic member, the at least one elastic member is arranged on the transmission seat and has an elastic locating part protruding from the transmission seat, when the transmission seat is located at the first position, the gate plates and the at least one elastic member are located in the chamber of the valve body, so that the valve ports of the valve body are opened, when the transmission seat is located at the second position, the gate plates seal the valve ports of the valve body, and the elastic locating part of the at least one elastic member abuts against the locating plate of the valve body; Wherein, the at least one elastic member further has two opposite elastic parts, one end of the elastic part is connected to the gate plate, and the other end of the elastic part is connected to the elastic locating part; Wherein, the elastic parts have different elastic coefficients; Wherein, the gate plate unit has at least two elastic members, the length of the elastic part of one of the elastic members is greater than the length of the elastic part of the other elastic member. ​ ​ 4. The gate valve of claim 3, wherein, The transmission seat has two opposite sides each having a transmission protrusion. The elastic member has two elastic portions each having a long hole adjacent to the elastic positioning portion, and the long hole is slidably sleeved on the transmission protrusion.

5. The gate valve according to any one of claims 1 to 4, characterized in that The shutter unit further has two balls arranged on the two opposite sides of the transmission seat. Each of the shutter units has a rolling groove on one side of the transmission seat. Each of the rolling grooves has a first section and a second section connected to the first section. The depth of the first section is greater than that of the second section. When the transmission seat is in the first position, the balls are located in the first sections of the rolling grooves. When the transmission seat is in the second position, the balls are located in the second sections of the rolling grooves and push the shutters outward, so that the shutters seal the valve port.

6. The gate valve according to claim 1 or 3, characterized in that The valve further comprises a fluid pressure cylinder arranged on the valve body. The fluid pressure cylinder has a driving shaft arranged in the chamber and connected to the transmission seat.

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