Retractable valve seat presser

Abstract

The utility model discloses a telescopic valve seat presser, including the connecting seat, the connecting rod is rotatably installed on the connecting seat, the bottom of connecting rod is fixed with the rotary support plate, and the rotary support plate is evenly distributed with a plurality of telescopic press plates around the outer periphery of connecting rod between the connecting seat, each telescopic press plate is radially slidingly installed on the connecting seat along the connecting rod, and the rotary support plate is equipped with the drive part that drives each telescopic press plate and slides out and retracts along the radial of connecting rod. The utility model designs a novel installation tool, so that the telescopic press plate can extend and retract, in the retracted state, the telescopic press plate can conveniently extend into the valve body or exit from the valve body, in the extended state, the outer periphery is greater than the diameter of valve seat and can press the valve seat, the press installation of valve seat is completed, as a novel auxiliary tool, can be applicable to the installation of this kind of valve seat in the valve body, has simple structure, convenient operation, ingenious design and the like.

Description

Technical Field

[0001] This utility model relates to valve seat installation tools, and more particularly to a telescopic valve seat press-fitter. Background Technology

[0002] In existing technologies, knife gate valves use the rising and falling of a thin gate to cut off or connect fluid, thereby opening and closing the valve. (See [link to relevant documentation]). Figure 9 This type of thin gate valve sealing method mainly involves installing an annular rubber valve seat on one side of the valve body. The sealing effect is achieved by the gate valve squeezing the valve seat. The valve seat is installed by inserting a pressure plate into the valve body. The size of the pressure plate is larger than the size of the valve seat. Then, pressure is applied to the pressure plate using a pressure device. The pressure plate squeezes the valve seat and presses it into the groove machined on the valve body. However, because the size of the valve seat is larger than the flange size, the pressure plate cannot smoothly enter the interior of the valve body, and it is impossible to use the pressure plate to apply pressure to the valve seat. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a telescopic valve seat presser with a simple structure, ingenious design, and adjustable press plate size.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a telescopic valve seat presser, including a connecting seat, a connecting rod rotatably mounted on the connecting seat, a rotary support plate fixed at the bottom end of the connecting rod, a plurality of telescopic press plates evenly distributed around the outer periphery of the connecting rod between the rotary support plate and the connecting seat, each telescopic press plate being slidably mounted on the connecting seat along the radial direction of the connecting rod, the rotary support plate being provided with a driving component that drives each telescopic press plate to slide out and retract along the radial direction of the connecting rod, the driving component including a plurality of spiral grooves arranged on the upper surface of the rotary support plate and pins provided on the lower surface of each telescopic press plate, each pin extending into the corresponding spiral groove and being slidable along the spiral groove.

[0005] As a preferred technical solution, the lower surface of the connecting seat is provided with a plurality of limiting straight grooves, the limiting straight grooves are located in the radial direction of the connecting rod, the top end of the telescopic press plate is provided with a keyway, a limiting flat key is installed in the keyway, and the limiting flat key slides along the limiting straight groove.

[0006] As a preferred technical solution, the connecting rod is axially limited and connected to the connecting seat by a fixing nut.

[0007] As a preferred technical solution, the bottom end of the rotary support plate abuts against the limiting shoulder of the connecting rod, and the rotary support plate is connected to the connecting rod by a key.

[0008] As a preferred technical solution, a rotary handle is installed at the top of the connecting rod.

[0009] As a preferred technical solution, the connecting seat is provided with a handle clearance space.

[0010] Due to the adoption of the above technical solution, the beneficial effects of this utility model are as follows: This utility model designs a new type of installation tool, which allows the telescopic pressure plate to extend and retract. In the retracted state, the telescopic pressure plate can be easily inserted into or withdrawn from the valve body. In the extended state, its outer circumference is larger than the valve seat diameter, which can apply pressure to the valve seat to complete the pressure installation of the valve seat. As a new type of auxiliary tool, it can be applied to the installation of valve seats located inside the valve body. It has the characteristics of simple structure, convenient operation, and ingenious design. Attached Figure Description

[0011] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the present invention.

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the telescopic press plate in the retracted state according to an embodiment of this utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the telescopic pressing plate in the extended state according to an embodiment of this utility model;

[0015] Figure 4 This is a top view of the telescopic pressing plate according to an embodiment of this utility model;

[0016] Figure 5 This is a cross-sectional view of the telescopic pressing plate of this utility model embodiment;

[0017] Figure 6 This is a top view of the rotary support plate according to an embodiment of the present invention;

[0018] Figure 7 This is a schematic diagram of the telescopic pressing plate in the retracted state according to an embodiment of this utility model;

[0019] Figure 8 This is a schematic diagram of the telescopic pressing plate in the extended state according to an embodiment of this utility model;

[0020] Figure 9 A schematic diagram of the structure of a knife gate valve in the background art;

[0021] In the diagram: 1-Connecting seat; 2-Connecting rod; 3-Rotating support plate; 4-Telescopic pressing plate; 5-Limiting straight groove; 6-Keyway; 7-Limiting flat key; 8-Helical groove; 9-Pin; 10-Fixing nut; 11-Limiting shoulder; 12-Rotating handle; 13-Pressure head; 14-Valve body; 15-Valve seat. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0023] like Figure 1 and Figure 2 As shown, the telescopic valve seat press-fitter includes a connecting seat 1, which serves as the mounting base for this device. A connecting rod 2 is rotatably mounted on the connecting seat 1. A rotary support plate 3 is fixed to the bottom end of the connecting rod 2. Multiple telescopic press-fit plates 4 are evenly distributed around the outer periphery of the connecting rod 2 between the rotary support plate 3 and the connecting seat 1. Each telescopic press-fit plate 4 is slidably mounted on the connecting seat 1 along the radial direction of the connecting rod 2. The rotary support plate 3 is provided with a driving component that drives each telescopic press-fit plate 4 to slide out and retract along the radial direction of the connecting rod 2. In use, the connecting rod 2 drives the rotary support plate 3 to rotate, and the driving component causes each telescopic press-fit plate 4 to slide out and retract along the radial direction of the connecting rod 2. In the retracted state, the telescopic press-fit plate 4 can be inserted into or removed from the valve body 14. When it is necessary to press-fit the valve seat 15, the telescopic press-fit plate 4 is extended beyond the diameter of the valve seat 15 to achieve the installation of the valve seat 15.

[0024] See Figure 4 The lower surface of the connecting seat 1 is provided with a plurality of limiting straight grooves 5. The limiting straight grooves 5 are located in the radial direction of the connecting rod 2 to restrict the telescopic press plate 4 from moving in a straight line. The top of the telescopic press plate 4 is provided with a keyway 6. A limiting flat key 7 is installed in the keyway 6. The limiting flat key 7 slides along the limiting straight grooves 5.

[0025] See Figure 5 and Figure 6 The driving component includes multiple spiral channels 8 arranged on the upper surface of the rotary support plate 3 and pins 9 provided on the lower surface of each of the telescopic press plates 4. Each pin 9 extends into the corresponding spiral channel 8 and can slide along the spiral channel 8.

[0026] In this embodiment, three telescopic pressing plates 4 are provided, and correspondingly, three spiral channels 8 and three limiting straight grooves 5 are provided. The three telescopic pressing plates 4 are formed by equally dividing a circular ring.

[0027] The top end of the connecting rod 2 is axially limited and connected to the connecting seat 1 by a fixing nut 10. The fixing nut 10 is threaded onto the connecting rod 2 and supported and connected to the connecting seat 1.

[0028] The bottom end of the rotary support plate 3 abuts against the limiting shoulder 11 of the connecting rod 2, and the rotary support plate 3 is connected to the connecting rod 2 by a key.

[0029] A rotary handle 12 is fixed to the top of the connecting rod 2, allowing the telescopic pressing plate 4 to extend and retract by manually rotating the connecting rod 2. Alternatively, the connecting rod 2 can be driven by a motor.

[0030] The connecting seat 1 is provided with a handle clearance space, and the end of the rotary handle 12 extends out from the handle clearance space, which facilitates swing operation.

[0031] When the telescopic press-fitting plate 4 is retracted, it is in a small-diameter state, with its outer circumference smaller than the diameter of the flange opening of the valve body 14, allowing it to enter the interior of the valve body 14. When the telescopic press-fitting plate 4 is extended, it is in a large-diameter state, with its outer circumference larger than the diameter of the valve seat 15, allowing it to apply pressure to the valve seat 15. Since the outer circumference of each telescopic press-fitting plate 4 is discontinuous when fully extended, some parts of the valve seat 15 may not be pressurized when pressure is applied. In this case, after one press-fitting operation, the press-fitting device or the valve body 14 can be rotated by a certain angle to apply pressure to the valve seat 15 again using the telescopic press-fitting plate 4, thus completing the full circumference pressure application to the valve seat 15.

[0032] The working principle of this embodiment is as follows:

[0033] The connecting seat 1 of the press-fitter is fixed to the bottom end of the pressure head 13 of the press-fitting equipment. When press-fitting the valve seat 15, the valve body 14 is laid flat so that the mounting groove for installing the valve seat 15 faces upward. First, the valve seat 15 is sent from the flange port in the valve body 14 into the mounting groove. Then, the pressure head 13 drives the press-fitter to move downward toward the inside of the valve body 14. At this time, the telescopic press-fitting plate 4 is fully retracted and smaller than the flange port diameter of the valve body 14. Therefore, the pressure head 13 can drive the telescopic press-fitting plate 4 to extend into the press-fitting position inside the valve body 14. See the state below. Figure 2 and Figure 7 ;

[0034] Then, by swinging the rotary handle 12, the connecting rod 2 drives the rotary support plate 3 to rotate. During the rotation of the rotary support plate 3, the spiral groove 8 forces the pin 9 to slide along the spiral groove 8, thereby causing the telescopic press plate 4 to gradually extend beyond the diameter of the valve seat 15. See the attached diagram for the desired state. Figure 4 and Figure 8At this time, the pressing equipment applies downward pressure through the pressure head 13, causing the telescopic pressing plate 4 to press down on the valve seat 15, thereby pressing the valve seat 15 into the installation groove. After installation, the rotary handle 12 is swung in the opposite direction, causing the shrink pressing plate to retract. The shrink pressing plate is driven by the pressing equipment to exit directly from the valve body 14.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A telescopic valve seat press-fitter, characterized in that: The device includes a connecting seat, on which a connecting rod is rotatably mounted. A rotary support plate is fixed to the bottom end of the connecting rod. Multiple telescopic pressing plates are evenly distributed around the outer periphery of the connecting rod between the rotary support plate and the connecting seat. Each telescopic pressing plate is slidably mounted on the connecting seat along the radial direction of the connecting rod. The rotary support plate is provided with a driving component that drives each telescopic pressing plate to slide and retract along the radial direction of the connecting rod. The driving component includes multiple spiral grooves arranged on the upper surface of the rotary support plate and pins arranged on the lower surface of each telescopic pressing plate. Each pin extends into the corresponding spiral groove and can slide along the spiral groove.

2. The telescopic valve seat press-fitter as described in claim 1, characterized in that: The lower surface of the connecting seat is provided with a plurality of limiting straight grooves, the limiting straight grooves being located in the radial direction of the connecting rod, the top end of the telescopic press plate is provided with a keyway, a limiting flat key is installed in the keyway, and the limiting flat key slides along the limiting straight groove.

3. The telescopic valve seat press-fitter as described in claim 1, characterized in that: The connecting rod is axially limited and connected to the connecting seat by a fixing nut.

4. The telescopic valve seat press-fitter as described in claim 1, characterized in that: The bottom end of the rotary support plate abuts against the limiting shoulder of the connecting rod, and the rotary support plate is connected to the connecting rod by a key.

5. The telescopic valve seat press-fitter as described in claim 1, characterized in that: A rotary handle is installed at the top of the connecting rod.

6. The telescopic valve seat press-fitter as described in claim 5, characterized in that: The connector is provided with a handle clearance space.

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