CN219899959U

CN219899959U - Be used for check valve binding off and leakproofness to detect frock

Info

Publication number: CN219899959U
Application number: CN202223570607.2U
Authority: CN
Inventors: 彭芸; 刘鑫宇; 黄伟; 谭奕
Original assignee: Yibin Sanjiang Machinery Co Ltd
Current assignee: Yibin Sanjiang Machinery Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-10-27
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a tool for detecting the closing-in and tightness of a one-way valve, which belongs to the technical field of machining and comprises a joint, a plug and a gland, wherein the joint and the gland are respectively detachably connected to two ends of the plug; the connector is internally provided with a medium through hole, the diameter of the mounting hole is larger than that of the medium through hole in the connector, and the mouth collector is further provided with a connecting piece communicated with the mouth-closing hole. The utility model ensures that the one-way valve can finish closing up and adjust the sealing degree and flow rate under the assistance of the tool, ensures that the closing up quality of the one-way valve is qualified, and ensures that the closing up of the one-way valve keeps good consistency.

Description

Be used for check valve binding off and leakproofness to detect frock

Technical Field

The utility model belongs to the technical field of machining, and particularly relates to a tool for detecting closing-in and tightness of a one-way valve.

Background

As shown in FIG. 1, the one-way valve is composed of a shell, a steel ball, a spring, a bracket, a plug and other parts, the right end of the shell needs to be closed when being assembled, and the closing is stopped when the right end of the shell is deformed by about 45 degrees. At present, two common closing modes of a company are punch punching closing and lathe extrusion closing, and the two closing modes have limitations when in use; the punch point closing-up can damage parts due to inaccurate positioning, can also cause closing-up failure due to unqualified assembly indexes such as flow, tightness and the like, and can meet assembly requirements after closing-up again or for a plurality of times; when a turnup closes, an operator cannot confirm whether the tightness of the closing position meets the requirement, the closing product needs to be taken to an assembly working section for testing, the next step of work is carried out according to the tightness condition, the closing process is too long in period, the process is tedious, and the product output is seriously affected.

In order to solve the problems of unstable closing quality, complex process and the like, a closing tool capable of being used on a test bed is required to be designed.

Disclosure of Invention

The utility model aims to provide a tool for detecting the closing-in and the tightness of a one-way valve, which can ensure that the closing-in of the one-way valve can be completed and the tightness and flow rate of the one-way valve can be regulated under the assistance of the tool, ensure that the closing-in quality of the one-way valve is qualified and ensure that the closing-in consistency of the one-way valve is kept good.

In order to achieve the aim of the utility model, the technical scheme adopted is as follows: the utility model provides a be used for check valve binding off and leakproofness to detect frock, includes joint, end cap and gland, and joint, gland are detachable respectively to be connected at the end cap both ends, and the end cap is inside to have the mounting hole of installing the check valve, and installs the stopper that can be close to or keep away from the end cap in the gland, and the one side that the stopper is close to the end cap has the binding off hole that closes up the check valve binding off end; the connector is internally provided with a medium through hole, the diameter of the mounting hole is larger than that of the medium through hole in the connector, and the mouth collector is further provided with a connecting piece communicated with the mouth-closing hole.

Furthermore, one end of the plug close to the connector is provided with a limiting end face, and one end of the connector close to the plug is sleeved on the plug through threads.

Furthermore, a sealing ring I is tightly pressed between the limiting end face and the joint end face.

Further, one end of the gland close to the plug is sleeved on the plug through threads.

Furthermore, the gland is cylindric, and the gland is open with the fixed one end of end cap, and the gland is closed for the one end that keeps away from the end cap, and the connecting piece is the adjusting screw who fixes on the gland closed end, and the binding off ware passes through the screw thread to be installed on adjusting screw, and adjusting screw is inside have the through-hole with binding off hole intercommunication.

Further, the adjusting screw is arranged on the pressure cover in a threaded manner, and the diameter of one end, close to the plug, of the adjusting screw is smaller than the closing-in diameter of the one-way valve.

Furthermore, a gap is formed in the circumferential surface of the gland, and a bolt is further installed on the mouth collector and extends outwards through the gap.

Further, the number of the notches and the bolts is at least two, and the notches are distributed at intervals along the circumferential direction of the gland.

Furthermore, a lock nut is further arranged at one end, far away from the plug, of the adjusting screw.

Furthermore, one end of the mounting hole, which is close to the joint, is also provided with a mounting ring groove 43, and a sealing ring II is arranged in the mounting ring groove 43.

Furthermore, one end of the adjusting screw, which is far away from the plug, is of a filler neck structure.

The utility model has the advantages that,

1. according to the utility model, the closing-in hole is formed in the closing-in device, the closing-in device can be close to or far away from the plug, after the one-way valve to be closed is arranged in the mounting hole, the closing-in device is gradually close to the plug, one end of the one-way valve to be closed is gradually closed through the guide of the wall of the closing-in hole, the one-way valve is finally closed, the quality of the closed one-way valve is stable, and the tightness and flow of the one-way valve are regulated by controlling the closing-in degree of the one-way valve; meanwhile, the connecting piece is matched with the medium through hole in the connector, so that the check valve can finish the test of the sealing degree and the flow rate while closing in.

2. The utility model adopts a combined structure, is convenient to process, assemble and maintain, is convenient to operate, and improves the qualification rate and the processing efficiency of products.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model.

FIG. 1 is a schematic view of a prior art check valve;

FIG. 2 is a schematic structural view of a tool for detecting the closing-in and the tightness of a one-way valve provided by the utility model;

FIG. 3 is a schematic structural view of a joint;

FIG. 4 is a schematic structural view of a plug;

FIG. 5 is a schematic structural view of a gland;

FIG. 6 is a cross-sectional view of A-A of FIG. 5;

FIG. 7 is a schematic structural view of the mouthpiece;

FIG. 8 is a schematic view of the structure of the adjusting screw;

FIG. 9 is another schematic structural view of the check valve closing-in and tightness detection tool provided by the utility model;

fig. 10 is a schematic view of the structure of the adjusting screw of fig. 9.

The reference numerals and corresponding part names in the drawings:

1. the device comprises a connector, 2, a sealing ring II, 3, a sealing ring I, 4, a plug, 5, a gland, 6, a bolt, 7, a mouth-closing device, 8, a locking nut, 9 and an adjusting screw;

11. a dielectric via;

41. mounting holes 42, limiting end faces 43 and sealing ring grooves;

51. notches, 52, stiffening ribs;

71. closing up the hole;

91. and a through hole.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the substances, and not restrictive of the utility model. It should be further noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings.

In addition, the embodiments of the present utility model and the features of the embodiments may be combined with each other without collision. The present utility model will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in FIG. 3, the tool for detecting the closing-in and the tightness of the check valve comprises a joint 1, a plug 4 and a gland 5, wherein the joint 1, the plug 4 and the gland 5 are made of 40 Cr/45#/30 CrMnSiA, the hardness of the joint 1, the plug 4 and the gland 5 is HRC 38-43, the phenomenon of locking (or referred to as biting) when similar materials are connected due to different materials of two mutually connected parts is ensured, and the joint 1, the plug 4 and the gland 5 are subjected to rough machining and heat treatment in sequence and then subjected to finish machining forming. The central axes of the joint 1, the compression bar and the plug 4 are all on the same axis, the joint 1 and the gland 5 are respectively positioned at two ends of the plug 4, and the joint 1 and the gland 5 are detachably connected with the plug 4.

As shown in fig. 4, the inside of the plug 4 is provided with a mounting hole 41 for mounting the one-way valve to be closed, and the diameter of the mounting hole 41 is matched with the diameter of the one-way valve to be closed; meanwhile, the closing-in device 7 which can be close to or far away from the plug 4 is installed in the gland 5, as shown in fig. 7, a closing-in hole 71 is formed in one side, close to the plug 4, of the closing-in device 7, the central axis of the closing-in hole 71 and the central axis of the mounting hole 41 are on the same straight line, the closing-in hole 71 is in a horn shape, and the diameter of one end, extending towards the plug 4, of the closing-in hole 71 is gradually increased. Through setting up the binding off hole 71 into loudspeaker form, when installing the check valve in mounting hole 41 needs to carry out the binding off, the one end of waiting to close on the check valve supports to draw together on the pore wall of binding off hole 71, along with the stopper 7 is close to end cap 4 gradually, through the guide of binding off hole 71 pore wall, the one end of waiting to close on the check valve gradually carries out the binding off, when stopper 7 supports tightly the terminal surface at end cap 4 completely, the one end of waiting to close on the check valve accomplishes the binding off.

As shown in fig. 3, the inside of the connector 1 is provided with a medium through hole 11, the central axis of the medium through hole 11 is in the same straight line with the central axis of the mounting hole 41, the diameter of the medium through hole 11 inside the connector 1 is smaller than that of the mounting hole 41, a limiting spigot is formed between the medium through hole 11 inside the connector 1 and the mounting hole 41, after the check valve is mounted in the mounting hole 41, the rear end of the check valve can be abutted against the limiting spigot, along with the gradual abutting of the mouth collector 7 on the end face of the plug 4, one end of the check valve to be closed is abutted against the closing hole 71, and finally the check valve to be closed is fixed in the mounting hole 41. The closing-in device 7 is also provided with a connecting piece communicated with the closing-in hole 71.

When the check valve needs to be closed, the check valve to be closed is installed in the installation hole 41, the closing-in device 7 is gradually close to the plug 4, the rear end of the check valve is abutted against the medium through hole 11 and the installation hole 41 to form a limiting spigot, the closing-in device 7 is continuously close to the plug 4, the opening is gradually closed at one end of the check valve to be closed through the guide of the wall of the closing-in hole 71, and when the closing-in device 7 is completely abutted against the end face of the plug 4, the closing-in is completed at one end of the check valve to be closed.

In the closing-in process of the check valve, the compression amount of the spring in the check valve is adjusted by controlling the closing-in degree of the check valve, so that the hard seal at the hemispherical surface is adjusted. In the closing-in process of the check valve, the medium is made to enter the check valve installed in the installation hole 41 through the medium through hole 11, so that the flow and the sealing degree of the check valve are detected.

As a further improvement in this embodiment, as shown in fig. 4, an end of the plug 4 near the joint 1 is further provided with a limiting end face 42, and an end of the joint 1 near the plug 4 is screwed on the plug 4. Specifically, an annular groove which is coaxially and radially arranged at intervals with the mounting hole 41 is formed in one end, close to the joint 1, of the plug 4, one end, close to the plug 4, of the joint 1 is sleeved on the plug 4 in a threaded manner and then is positioned in the annular groove, and at the moment, the limiting end face 42 is the bottom of the annular groove; meanwhile, a limiting disc can be directly arranged on the outer wall of the plug 4, and when one end of the connector 1 close to the plug 4 is sleeved on the plug 4 through threads, the section of the limiting disc close to one end of the connector 1 is the limiting end face 42. By arranging the limiting end face 42 on the plug 4, the tightening and fixing effects of the joint 1 and the plug 4 are better.

As a further improvement in this embodiment, as shown in fig. 2, a sealing ring ii 2 is sleeved on the end of the plug 4 near the joint 1, when the joint 1 is screwed on the plug 4, the sealing ring ii 2 is pressed between the limiting end face 42 and the end face of the joint 1, so as to effectively prevent the medium entering the joint 1 from leaking through the threads between the plug 4 and the joint 1, and ensure the tightness of the present utility model.

As a further improvement in this embodiment, as shown in fig. 5 and 6, the gland 5 is cylindrical, one end of the gland 5 is open, the other end of the gland 5 is closed, the open end of the gland 5 is sleeved on the plug 4 through threads, and the connecting piece is mounted at the closed end of the gland 5; the connecting piece is an adjusting screw 9 installed on the closed end of the gland 5, as shown in fig. 8, the axial direction of the adjusting screw 9 is consistent with the axial direction of the gland 5, the central axis of the adjusting screw 9 is on the same straight line with the central axis of the installation hole 41, meanwhile, the mouth-piece 7 is installed on the adjusting screw 9 through threads, the adjusting screw 9 penetrates through the mouth-piece 7, and the mouth-piece 7 moves on the adjusting screw 9 through rotating the mouth-piece 7, so that the mouth-piece 7 is close to or far away from the plug 4, and the movement of the mouth-piece 7 is met when the mouth-piece 7 is installed. The adjusting screw 9 has a through hole 91 therein, and both ends of the through hole 91 penetrate both end surfaces of the adjusting screw 9, so that the through hole 91 communicates with the mounting hole 41 while the mouth receiver 7 is mounted on the adjusting screw 9.

The materials of the mouth reducer 7 and the adjusting screw 9 can be alloy tool steel such as GCr15 or CrWMn, the hardness of the mouth reducer 7 and the adjusting screw 9 is HRC 55-60, and the mouth reducer 7 and the adjusting screw 9 are subjected to vacuum heat treatment in the production process, so that the wear resistance of the mouth reducer 7 and the adjusting screw 9 is improved. In order to avoid shaking of the mouth-piece 7 in the rotating process, the gap between the outer wall of the mouth-piece 7 and the inner wall of the gland 5 is not more than 0.05/double sides.

As a further improvement in this embodiment, as shown in fig. 2 and 9, the adjusting screw 9 is screwed on the gland 5, when the adjusting screw 9 is turned, the adjusting screw 9 is close to or far away from the plug 4, and meanwhile, the diameter of the end of the adjusting screw 9 close to the plug 4 is smaller than the closing-in diameter of the check valve, so that the end of the adjusting screw 9 close to the plug 4 can penetrate through the closing-in hole 71 and the closing-in hole on the check valve and then extend into the check valve to push the valve seat of the check valve, thereby not only facilitating the closing-in of the check valve, but also adjusting the tightness and flow of the check valve by adjusting the closing-in degree of the check valve.

In the present embodiment, the diameter of the entire adjusting screw 9 is uniform, and at this time, the diameter of the entire adjusting screw 9 is smaller than the closing diameter of the check valve; of course, in this embodiment, the diameter of the adjusting screw 9 near one end of the plug 4 may be reduced, at this time, the adjusting screw 9 is a stepped shaft, the portion of the adjusting screw 9 in threaded engagement with the closing device 7 is a large diameter section of the adjusting screw 9, and the portion of the adjusting screw 9 penetrating the closing hole 71 and inserted into the closing of the check valve is a small diameter section of the adjusting screw 9, so that the strength of the adjusting screw 9 is ensured, and the pushing of the adjusting screw 9 to the valve seat in the check valve is not affected.

As a further improvement in this embodiment, as shown in fig. 5 and 6, a notch 51 is further formed on the circumferential surface of the gland 5; meanwhile, in order to conveniently drive the mouth-closing device 7, the mouth-closing device 7 is further provided with a plug 6, the plug 6 is made of 1Cr17Ni2 or other structural steel, the hardness of the plug 6 is HRC 38-43, the axial direction of the plug 6 is consistent with the radial direction of the mouth-closing device 7, one end of the plug 6, far away from the mouth-closing device 7, penetrates through the socket notch 51 to extend outwards, so that when the mouth-closing device 7 needs to close a one-way valve arranged in the mounting hole 41, a worker can drive the mouth-closing device 7 to rotate through the plug 6, and therefore the mouth-closing device 7 moves towards the plug 4 to close the one-way valve. In order to ensure that the one-time rotating angle of the mouth-piece 7 can meet the closing-up of the one-way valve, the radian of the notch 51 on the circumferential surface of the gland 5 is more than 90 degrees, and the length of the notch 51 in the axial direction of the gland 5 is more than one half of the length of the gland 5, so that when a worker drives the mouth-piece 7 to rotate through the bolt 6, the one-time rotating angle of the mouth-piece 7 is more than 90 degrees, and the movement of the mouth-piece 7 in the axial direction of the adjusting screw 9 cannot be influenced due to the limitation of the notch 51 on the bolt 6 in the rotating process of the mouth-piece 7; because the displacement of the mouth collector 7 along the direction of the adjusting screw 9 is smaller when the check valve closes, the mouth collector 7 rotates within the range of the notch 51, and closing of the check valve can be satisfied. In order to facilitate the installation and the disassembly of the bolt 6, the bolt 6 and the closing device 7 can be connected through threads. In the present embodiment, the specific arc of the notch 51 on the circumferential surface of the gland 5 may be designed according to the angle at which the mouth piece 7 needs to be rotated when closing the check valve.

As a further improvement in this embodiment, at least two notches 51 are symmetrically arranged on the circumferential surface of the gland 5, at this time, the radian of the notch 51 on the circumferential surface of the gland 5 is smaller than 180 °, so that the reinforcing ribs 52 are arranged between the two notches 51, and when a worker rotates the necking device 7 through the bolt 6, the reinforcing ribs 52 limit the bolt 6, so as to avoid excessive rotation of the necking device 7 and prevent excessive necking of the check valve due to excessive distance of the necking device 7 moving along the axial direction of the adjusting screw 9. When the number of the notches 51 is plural, the number of the bolts 6 may be plural, when the number of the bolts 6 is plural, the two bolts 6 respectively correspond to the two notches 51, at this time, the two bolts 6 do not need to be symmetrically arranged on the closing device 7, and when the number of the bolts 6 is equal to the number of the notches 51, the plurality of bolts 6 are in one-to-one correspondence with the plurality of the notches 51.

As a further improvement in this embodiment, as shown in fig. 2, the end of the adjusting screw 9 away from the plug 4 is further provided with a lock nut 8, so that the adjusting screw 9 can be locked and fixed on the gland 5 by the lock nut 8 when the adjusting screw 9 synchronously rotates while the mouth-piece 7 is prevented from rotating in the closing process of the check valve, and the adjusting screw 9 is more firmly installed. When the hard seal at the hemispherical surface of the check valve and the flow of the check valve are required to be regulated, the locking nut 8 can be loosened, the regulating screw 9 is rotated, the pushing degree of the regulating screw 9 to the valve seat in the check valve is regulated, then the locking nut 8 is locked to the regulating screw 9, and the closing degree of the check valve is matched with the mouth collector 7, so that the tightness and the flow of the check valve are regulated.

As a further improvement in this embodiment, as shown in fig. 4, the end of the mounting hole 41, which is close to the joint 1, is further provided with a mounting ring groove 43, the mounting ring groove 43 is located on the hole wall of the mounting hole 41, and a sealing ring i 3 is installed in the mounting ring groove 43, when the check valve is installed in the mounting hole 41, the outer wall of the check valve housing abuts against the sealing ring i 3 and seals, which not only effectively prevents the check valve from rotating after being installed in the mounting hole 41, but also forms a sealing structure between the check valve housing and the inner wall of the mounting hole 41, so as to avoid the influence on the sealing test caused by leakage of the medium directly through the gap between the check valve housing and the inner wall of the mounting hole 41 when the sealing test is performed.

As a further improvement in this embodiment, as shown in fig. 9 and 10, the end of the adjusting screw 9 away from the plug 4 is in a filler neck structure, so that the end of the adjusting screw 9 away from the plug 4 is convenient to interface with other devices.

In the utility model, when one end of the adjusting screw 9 far away from the plug 4 is not provided with a nozzle structure, a cross groove can be formed on the end surface of the adjusting screw 9 far away from the plug 4, so that the screw can be driven to rotate by a cross screwdriver in the later stage.

When the check valve needs to be closed, the joint 1 is screwed and fixed on the plug 4, the check valve to be closed is arranged in the mounting hole 41, the closing device 7 is arranged in the gland 5, and the plug 4 is screwed and fixed on the plug 4; then, the adjusting screw 9 is arranged on the gland 5 through threads, one end, close to the plug 4, of the adjusting screw 9 passes through the mouth collector 7, the mouth collecting hole 71 and the mouth collecting hole of the one-way valve and then is abutted against the valve seat in the one-way valve, finally, the bolt 6 is fixed on the mouth collector 7, the mouth collector 7 is rotated through the bolt 6, the mouth collector 7 advances while rotating, the mouth collecting hole 71 is guided by the hole wall of the mouth collecting hole, one end, to be closed, of the one-way valve is gradually closed, and when the mouth collector 7 is completely abutted against the end face of the plug 4, the mouth collecting end of the one-way valve is closed.

In the closing-in process of the check valve, the compression amount of the spring in the check valve is adjusted by controlling the closing-in degree of the check valve, so that the hard seal at the hemispherical surface and the flow of the medium passing through the check valve are adjusted.

When the tightness and the flow of the check valve after closing in are required to be detected, the joint 1 and the connecting piece are connected with the test bed, and a medium is sent into the check valve from the rear end of the check valve through the medium through hole 11 on the joint 1, so that the flow and the sealing degree of the check valve are detected.

After the check valve finishes closing up and detecting, the closing up device 7 is reversely rotated through the bolt 6, the closing up device 7 is reversely rotated and retreated, the gland 5 is detached from the plug 4, the adjusting screw 9 is withdrawn from the check valve while the gland 5 is detached, and finally the check valve which finishes closing up is taken out from the mounting hole 41. When the one-way valve is required to be closed continuously, the assembled gland 5 is directly screwed on the plug 4, and the mouth-piece 7 is rotated through the bolt 6.

When the tightness of the check valve is required to be detected, the medium is reversely fed into the check valve from the closing end of the check valve through the through hole 91 and the closing hole 71 on the connecting piece, so that the tightness of the check valve is detected.

The utility model can ensure the consistency of the closing-in quality of the products in the same batch, synchronously completes the sealing degree and flow test of the products, has obvious effect and is particularly suitable for batch production.

In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the utility model. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

It will be appreciated by persons skilled in the art that the above embodiments are provided for clarity of illustration only and are not intended to limit the scope of the utility model. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present utility model.

Claims

1. The utility model provides a be used for check valve binding off and leakproofness to detect frock, a serial communication port, including connect (1), end cap (4) and gland (5), connect (1), gland (5) detachable respectively are connected at end cap (4) both ends, the inside mounting hole (41) that install the check valve that have of end cap (4), and install in gland (5) can be close to or keep away from end cap (4) binding off ware (7), one side that binding off ware (7) are close to end cap (4) has and carries out binding off hole (71) of binding off to the check valve binding off end; the connector (1) is internally provided with a medium through hole (11), the diameter of the mounting hole (41) is larger than that of the medium through hole (11) in the connector (1), and the closing-in device (7) is further provided with a connecting piece communicated with the closing-in hole (71).

2. The tool for closing in the check valve and detecting the tightness according to claim 1, wherein one end of the plug (4) close to the joint (1) is further provided with a limiting end face (42), and one end of the joint (1) close to the plug (4) is sleeved on the plug (4) through threads.

3. The tool for detecting the closing-in and the tightness of the one-way valve according to claim 2, wherein a sealing ring II (2) is tightly pressed between the limiting end face (42) and the end face of the joint (1).

4. The tool for closing in and detecting tightness of the one-way valve according to claim 1, wherein one end of the gland (5) close to the plug (4) is sleeved on the plug (4) through threads.

5. The tool for closing-in of one-way valves and detecting tightness according to claim 1, wherein the gland (5) is cylindrical, one end of the gland (5) fixed with the plug (4) is open, one end of the gland (5) far away from the plug (4) is closed, the connecting piece is an adjusting screw (9) fixed on the closed end of the gland (5), the closing-in device (7) is mounted on the adjusting screw (9) through threads, and a through hole (91) communicated with the closing-in hole (71) is formed in the adjusting screw (9).

6. The tool for closing in the check valve and detecting the tightness according to claim 5, wherein the adjusting screw (9) is arranged on the gland (5) in a threaded manner, and the diameter of one end of the adjusting screw (9) close to the plug (4) is smaller than the closing-in diameter of the check valve.

7. The tool for closing in and detecting tightness of the one-way valve according to claim 5, wherein a lock nut (8) is further installed at one end of the adjusting screw (9) far away from the plug (4).

8. The tool for closing in the check valve and detecting the tightness according to claim 1, wherein a notch (51) is further formed in the circumferential surface of the gland (5), a plug pin (6) is further mounted on the closing-in device (7), and the plug pin (6) extends outwards through the notch (51).

9. The tool for closing in and detecting tightness of the check valve according to claim 8, wherein the number of the notches (51) and the pins (6) is at least two, and the plurality of notches (51) are arranged at intervals along the circumferential direction of the gland (5).

10. The tool for closing up the one-way valve and detecting the tightness according to claim 1, wherein one end of the mounting hole (41) close to the joint (1) is further provided with a mounting ring groove (43), and a sealing ring I (3) is arranged in the mounting ring groove (43).

11. The tool for closing in and detecting tightness of the one-way valve according to any one of claims 5 to 7, wherein one end of the adjusting screw (9) far away from the plug (4) is in a filler neck structure.