Torsion spring assembly tool for bivalve butterfly check valve

Abstract

The utility model discloses a torsion spring assembly tool of a bivalve butterfly check valve, which comprises an assembly sleeve and an assembly ejector rod coaxially arranged, an ejector rod reset spring is assembled between one end of the assembly sleeve and the assembly ejector rod in a limiting manner, and a spring moving and assembling device for placing a torsion spring is arranged between the other end of the assembly sleeve and the assembly ejector rod; during use, the two ends of the torsion spring are pressed to generate certain rear torsion to be placed in the spring moving and mounting device, at the moment, the torsion spring can be limited in the spring moving and mounting device under the action of the torsion of the torsion spring and can be synchronously transferred along with a tool to move to the surfaces of the two valve plates, and the assembly ejector rod is pressed downwards to further increase the torsion of the torsion spring and reduce the axis; the valve plate shaft can be installed on the lug plate hole and the torsion spring in series at the moment, the valve plate shaft can be removed by releasing the pressure on the assembly ejector rod, operation is easy, use is convenient, labor is saved, and the assembly efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tools for spring assembly, in particular to a torsion spring assembly tool for a double-flap butterfly check valve. Background Art

[0002] When the double-flap butterfly check valve is used, the two valve plates are driven by fluid pressure to rotate around the valve plate axis respectively. At this time, the two valve plates compress the torsion springs mounted on the valve plate axis and are in a close state, thereby opening the pipeline to allow the fluid to move and transport in the pipeline; when there is no pressure provided by the fluid in the pipeline, under the rebound effect of the torsion spring, the two valve plates are quickly restored to the state of intercepting and sealing the pipeline, and the pipeline is closed to prevent the medium from flowing back. During the assembly process of the valve plate, the valve plate axis and the torsion spring, the torsion spring needs to be rotated to carry a certain torque, so that it will be in a working loading state after installation, so that the two valve plates can always remain in the state of closing the pipeline in a natural state. At present, the assembly of the torsion spring is all manual. The torsion spring will have a large elastic force during and after the installation. It takes a large force to manually twist the torsion spring to the working loading state during installation. If the hand applies too much force, it will easily shake unconsciously during the process of moving the torsion spring, making it impossible to install it in place quickly and accurately. Therefore, manual installation is difficult, laborious and inefficient. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a torsion spring assembly tool for a double-flap butterfly check valve which is easy to use, labor-saving, simple to operate and helps to improve assembly efficiency.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a torsion spring assembly tool for a double-flap butterfly check valve, comprising a hollow assembly sleeve, a coaxially arranged assembly push rod is movably sleeved inside the assembly sleeve, and the two ends of the assembly push rod respectively extend to the outside of the assembly sleeve, a push rod return spring is limitedly installed between one end of the assembly sleeve and the assembly push rod, and a spring transfer device for placing a torsion spring is provided between the other end of the assembly sleeve and the assembly push rod.

[0005] As a preferred technical solution, the spring moving device includes two spring limiting vertical plates relatively fixedly connected to the outer wall of the assembly sleeve, and the bottom end of each of the spring limiting vertical plates is respectively provided with a spring limiting recess, and also includes a spring limiting baffle fixedly connected to the end of the assembly push rod, and the spring limiting baffle is arranged between the two spring limiting vertical plates.

[0006] As a preferred technical solution, the spring limit baffle is configured as an arc plate.

[0007] As a preferred technical solution, a push rod limiting device is provided between one end of the assembly sleeve where the spring moving device is mounted and the assembly push rod.

[0008] As a preferred technical solution, the push rod limiting device includes two push rod limiting recesses arranged opposite to each other at the bottom end of the assembly sleeve, and a push rod limiting shaft is provided through the assembly push rod, and both ends of the push rod limiting shaft respectively extend into the corresponding push rod limiting recesses.

[0009] As a preferred technical solution, a push rod pressing handle is fixedly connected to the top end of the assembly push rod.

[0010] As an improvement to the above technical solution, a spring limiting disk is fixedly provided on one end of the assembly sleeve close to the push rod reset spring, and the push rod reset spring limiting sleeve is mounted on the assembly push rod between the push rod pressing handle and the spring limiting disk.

[0011] Due to the adoption of the above technical scheme, the torsion spring assembly tooling of the double-flap butterfly check valve comprises a hollow assembly sleeve, a movable sleeve inside the assembly sleeve is provided with a coaxially arranged assembly push rod, and the two ends of the assembly push rod respectively extend to the outside of the assembly sleeve, a push rod return spring is limitedly installed between one end of the assembly sleeve and the assembly push rod, and a spring transfer device for placing the torsion spring is provided between the other end of the assembly sleeve and the assembly push rod; the utility model has the following beneficial effects: when in use, the two ends of the torsion spring are pressed to generate a certain rear torsion force and be placed in the spring transfer device, at which time, under the action of its own torsion force, it will be limited in the spring transfer device and can be transferred synchronously with the tooling to move it to the surface of the two valve plates, and the assembly push rod is pressed down to further increase the torsion force of the torsion spring and lower the axis until it is coaxial with the ear plate hole on the valve plate for assembling the valve plate shaft, at which time the valve plate shaft can be serially installed on the ear plate hole and the torsion spring, and the pressure on the assembly push rod can be released and the tooling can be removed, which is simple to operate, convenient to use, labor-saving, and has high assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0013] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0014] Figure 2 It is a schematic cross-sectional structure diagram of an embodiment of the utility model;

[0015] Figure 3 It is a schematic diagram of the changing state of the embodiment of the utility model when it is used;

[0016] Figure 4It is a schematic diagram of the use state of an embodiment of the utility model;

[0017] In the figure: 1-assembly sleeve; 2-assembly push rod; 3-push rod return spring; 4-spring limit vertical plate; 5-spring limit notch; 6-spring limit baffle; 7-push rod limit notch; 8-push rod limit shaft; 9-push rod pressing handle; 10-spring limit plate; 11-torsion spring; 12-valve body; 13-valve plate; 14-ear plate; 15-valve plate shaft. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0019] like Figure 1 , Figure 2 and Figure 3 As shown, the torsion spring assembly tool of the double-flap butterfly check valve is used to easily assemble the torsion spring 11 onto the valve plate shaft 15 of the double-flap butterfly check valve. Specifically, it comprises a hollow assembly sleeve 1, wherein a coaxially arranged assembly push rod 2 is movably sleeved inside the assembly sleeve 1, and both ends of the assembly push rod 2 extend to the outside of the assembly sleeve 1 respectively, and the assembly push rod 2 can move back and forth inside the assembly sleeve 1, so as to press the torsion spring 11 down into place when assembling the torsion spring 11. A push rod reset spring 3 is limitedly installed between one end of the assembly sleeve 1 and the assembly push rod 2, and after the torsion spring 11 is pressed down into place, the assembly push rod 2 can automatically return to its position under the elastic force of the push rod reset spring 3, so as to facilitate the next assembly and use. A spring moving device for placing the torsion spring 11 is provided between the other end of the assembly sleeve 1 and the assembly push rod 2, which can conveniently and arbitrarily move the torsion spring 11 and limit it during assembly, so that the torsion spring 11 can be accurately positioned and quickly assembled.

[0020] Specifically, the spring moving device includes two spring limiting plates 4 relatively fixedly connected to the outer wall of the assembly sleeve 1. The spring limiting plates 4 can be fixed to the assembly sleeve 1 by welding. A gap for accommodating the torsion spring 11 is formed between the two spring limiting plates 4. The gap can also avoid the valve plate shaft 15 when assembling the torsion spring 11, so that it can pass smoothly. The bottom end of each spring limiting plate 4 is respectively provided with a spring limiting recess 5, and also includes a spring limiting baffle 6 fixedly connected to the end of the assembly push rod 2, and the spring limiting baffle 6 is arranged between the two spring limiting plates 4. The spring limiting baffle 6 is set as an arc plate. When in use, the annular portion of the torsion spring 11 is placed directly below the spring limiting baffle 6, and its two supporting portions are pinched to allow the torsion spring 11 to generate a certain torque and then be placed in the corresponding spring limiting recess 5. Under the joint limiting action of the spring limiting baffle 6 and the two spring limiting recesses 5, the torsion spring 11 is limited between the two spring limiting vertical plates 4 and can be moved together with the tooling to facilitate its precise positioning.

[0021] A push rod limiting device is provided between one end of the assembly sleeve 1 where the spring transfer device is installed and the assembly push rod 2, which limits the upward return of the assembly push rod 2 to prevent it from being separated from the assembly sleeve 1, so that the two form an integrated connection structure. Specifically, the push rod limiting device includes two push rod limiting recesses 7 that are relatively arranged at the bottom end of the assembly sleeve 1, and a push rod limiting shaft 8 is provided through the assembly push rod 2. The two ends of the push rod limiting shaft 8 extend into the corresponding push rod limiting recess 7 respectively, and the push rod limiting recess 7 blocks the push rod limiting shaft 8, so that the upward movement of the assembly push rod 2 is limited.

[0022] A push rod pressing handle 9 is fixedly connected to the top of the assembly push rod 2, and the push rod pressing handle 9 can be fixedly connected to the assembly push rod 2 by welding. A spring limiting disk 10 is fixedly provided at one end of the assembly sleeve 1 close to the push rod return spring 3, and the push rod return spring 3 is limitedly sleeved on the assembly push rod 2 between the push rod pressing handle 9 and the spring limiting disk 10. The limit assembly of the push rod return spring 3 is achieved through the cooperation between the push rod pressing handle 9 and the spring limiting disk 10.

[0023] like Figure 4As shown, the double-flap butterfly check valve includes a valve body 12 and two valve plates 13 arranged in the valve body 12, and the valve plates 13 are provided with ear plates 14 for matching use and a valve plate shaft 15 for assembling the two valve plates 13. This embodiment is used to limit the torsion spring 11 and fit it on the valve plate shaft 15. The specific use process is as follows: pinch the two ends of the torsion spring 11, send its annular part between the two spring limiting vertical plates 4 and make it abut against the bottom end of the spring limiting baffle 6, release the pinching of the torsion spring 11, and it can be limited and fixed on the two spring limiting vertical plates 4 under the action of its own torsion force and can be moved arbitrarily together with the tooling; move it to the surface of the two valve plates 13, and make the two spring limiting vertical plates 4 abut against the surface of the valve plates 13, press down the assembly push rod 2 through the push rod pressing handle 9, so that the axis center of the annular part of the torsion spring 11 moves downward until it is concentric with the hole on the ear plate 14, take the valve plate shaft 15 through each ear plate 14 and the torsion spring 11, and the assembly of the torsion spring 11 is completed, release the downward pressure on the assembly push rod 2, and remove the tooling. It is simple to operate, easy to use, labor-saving, and has high assembly efficiency.

[0024] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. The torsion spring assembly tool for the double-flap butterfly check valve is characterized by: It comprises a hollow assembly sleeve, wherein a coaxially arranged assembly push rod is movably sleeved inside the assembly sleeve, and both ends of the assembly push rod respectively extend to the outside of the assembly sleeve, a push rod return spring is limitedly installed between one end of the assembly sleeve and the assembly push rod, and a spring transfer device for placing a torsion spring is provided between the other end of the assembly sleeve and the assembly push rod.

2. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 1, characterized in that: The spring moving device includes two spring limiting vertical plates relatively fixedly connected to the outer wall of the assembly sleeve, and the bottom end of each spring limiting vertical plate is respectively provided with a spring limiting recess, and also includes a spring limiting baffle fixedly connected to the end of the assembly push rod, and the spring limiting baffle is arranged between the two spring limiting vertical plates.

3. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 2, characterized in that: The spring limit baffle is configured as an arc plate.

4. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 1, characterized in that: A push rod limiting device is provided between one end of the assembly sleeve where the spring moving device is mounted and the assembly push rod.

5. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 4, characterized in that: The push rod limiting device includes two push rod limiting recesses arranged opposite to each other at the bottom end of the assembly sleeve, and a push rod limiting shaft is provided through the assembly push rod, and both ends of the push rod limiting shaft extend into the corresponding push rod limiting recesses respectively.

6. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 1, characterized in that: The top end of the assembly push rod is fixedly connected with a push rod pressing handle.

7. The torsion spring assembly tool for the double-flap butterfly check valve according to claim 6, characterized in that: A spring limiting disk is fixedly provided on one end of the assembly sleeve close to the ejector rod reset spring, and the ejector rod reset spring limiting sleeve is mounted on the assembly ejector rod between the ejector rod pressing handle and the spring limiting disk.

Images