Device for adjusting opening degree of cartridge valve

Abstract

The utility model relates to the technical field of die casting machinery, and provides a cartridge valve opening degree adjusting device which comprises an adjusting rod assembly axially and movably arranged on a cartridge valve cover, and the adjusting rod assembly comprises an adjusting rod and an adjusting screw detachably installed on the adjusting rod. An axial adjusting part is arranged between the adjusting screw rod and the cartridge valve cover, so that the adjusting rod assembly axially moves on the cartridge valve cover and the axial position of the adjusting rod assembly on the cartridge valve cover is adjusted; a limiting block used for limiting the movable adjusting stroke of the adjusting screw rod is arranged on one side of the cartridge valve cover and corresponds to the adjusting screw rod, and the adjusting screw rod moves between the cartridge valve cover and the limiting block in an axial limiting mode. The integral adjusting rod assembly is divided into the adjusting rod and the adjusting screw rod, the adjusting screw rod is designed into two sections of threads, a convex shoulder is arranged between the two sections of threads, and the adjusting screw rod is prevented from being screwed out and falling off through the limiting block installed on the cartridge valve cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of die casting machinery, and particularly relates to a plug-in valve opening degree adjusting device. BACKGROUND

[0002] The plug-in valve is used in the injection and pressure boosting of the injection part of the die casting machine, and the opening degree of the plug-in valve core is adjusted to control the pressure oil flow through the pressure boosting valve and the injection valve, so as to control the speed of the pressure boosting and injection actions. The opening degree of the valve core is realized by the plug-in valve opening degree adjusting device. The existing plug-in valve adjusting device has the following problems: some schemes integrate the adjusting rod and the adjusting screw, the concentricity of the adjusting rod and the plug-in valve cover is required to be high, which causes processing difficulty and high processing cost; some schemes separate the adjusting rod and the plug-in valve cover, but the adjusting screw is not limited, and the adjusting screw falls off from the plug-in valve cover, which affects normal use; and some schemes such as the plug-in valve adjusting device disclosed in Chinese Patent Application Publication No. CN103899774A published on July 2, 2014, when the valve core is opened, the huge hydraulic pressure on the entire valve core acts on the mounting plate, so the mounting plate and the fastening screw thereof need to be large enough to avoid being damaged by the huge hydraulic pressure, and therefore the cover plate needs to be thick enough to install the fastening screw of the mounting plate, which causes problems such as bulky structure, high cost, and large installation difficulty. CONTENT

[0003] The utility model discloses a plug-in valve opening degree adjusting device, the integral adjusting rod assembly is divided into two parts of adjusting rod and adjusting screw, and the adjusting screw is designed into two threads (adjusting section thread section and fastening thread section), a shoulder is arranged between the two threads, the adjusting screw is limited from being rotated out and falling off by the limiting block arranged on the plug-in valve cover, the structure design of the entire plug-in valve opening degree adjusting device is optimized, the processing difficulty of the entire plug-in valve opening degree adjusting device is reduced, the production cost is reduced, and the difficulty of disassembly, replacement and repair is reduced.

[0004] A plug-in valve opening degree adjusting device designed for the purpose, comprising an adjusting rod assembly movably arranged on a plug-in valve cover in an axial direction, wherein the adjusting rod assembly comprises an adjusting rod and an adjusting screw detachably mounted on the adjusting rod;

[0005] An axial adjusting part is arranged between the adjusting screw and the plug-in valve cover to movably arrange the adjusting rod assembly on the plug-in valve cover in an axial direction and adjust the axial position of the adjusting rod assembly on the plug-in valve cover;

[0006] A limiting block for limiting the adjusting travel of the adjusting screw is arranged on one side of the plug-in valve cover corresponding to the adjusting screw, and the adjusting screw is movably arranged in an axial direction between the plug-in valve cover and the limiting block.

[0007] The axial adjusting part comprises a threaded hole arranged on the plug-in valve cover and an adjusting segment threaded segment arranged on the adjusting screw, the adjusting screw is axially moved on the plug-in valve cover through the threaded cooperation between the adjusting segment threaded segment and the threaded hole.

[0008] A fastening cooperation part is arranged between the adjusting screw and the limiting block, and a locking fastener cooperates with the fastening cooperation part;

[0009] The adjusting screw is connected with the limiting block through the fastening cooperation part, the adjusting screw is fixed on the limiting block under the locking effect of the locking fastener, and the adjusting screw is axially moved on the limiting block under the releasing of the locking effect of the locking fastener.

[0010] The fastening cooperation part comprises a fastening threaded segment arranged on the adjusting screw and a connecting hole arranged on the limiting block, the fastening threaded segment of the adjusting screw is inserted into the connecting hole of the limiting block, and the locking fastener is fixedly connected with the fastening threaded segment to lock the adjusting screw on the limiting block.

[0011] A limiting part is arranged between the adjusting screw and the limiting block, and the adjusting screw is axially limitedly moved between the plug-in valve cover and the limiting block through the limiting part.

[0012] The limiting part comprises a shoulder arranged on the adjusting screw and a limiting step arranged on the limiting block, the shoulder is moved along the direction of the limiting step in the axial adjusting process of the adjusting screw, and the limiting step forms an anti-disengagement part for preventing the adjusting screw from disengaging outwardly from the limiting block.

[0013] The limiting block is provided with an adjusting hole and a connecting hole matched with the adjusting screw, the adjusting hole and the connecting hole are in communication with each other, and the adjusting screw is inserted into the adjusting hole and the connecting hole of the limiting block.

[0014] The diameter of the adjusting hole is greater than that of the connecting hole, so that the limiting step is formed between the adjusting hole and the connecting hole.

[0015] The diameter of the adjusting hole is greater than that of the shoulder, the adjusting hole and the shoulder are gap-fitted, the limiting block is fixed on the outside of the plug-in valve cover, and the shoulder is limitedly moved between the outside of the valve cover and the adjusting hole in the axial adjusting process of the adjusting screw.

[0016] The diameter of the connecting hole is smaller than that of the shoulder.

[0017] The plug-in valve cover is provided with an assembly hole matched with the adjusting rod, and the adjusting rod is inserted into the assembly hole of the plug-in valve cover.

[0018] The plug-in valve cover is provided with a fastening hole, the limiting block is provided with a locking hole, and a fastening part is arranged between the fastening hole and the locking hole, the fastening part is inserted into the fastening hole and the locking hole to fix the limiting block on the plug-in valve cover.

[0019] The beneficial technical effects of the utility model are as follows:

[0020] The integral adjusting rod assembly is divided into two parts of adjusting rod and adjusting screw rod, the adjusting screw rod is designed as two threads (adjusting thread section and fastening thread section), a shoulder is arranged between the two threads, the limiting block arranged on the cartridge valve cover limits the adjusting screw rod from being rotated and dropped, the structure design of the cartridge valve opening adjusting device is optimized, the processing difficulty of the cartridge valve opening adjusting device is reduced, the production cost is reduced, and the difficulty of disassembly, replacement and repair is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0022] Figure 1 It is the assembly cross section structure schematic drawing of cartridge valve cover, adjusting rod assembly and limiting block of the utility model embodiment.

[0023] Figure 2 It is the cross section structure schematic drawing of cartridge valve cover of the utility model embodiment.

[0024] Figure 3 It is the structure schematic drawing of adjusting screw rod of the utility model embodiment.

[0025] Figure 4 It is the cross section structure schematic drawing of limiting block of the utility model embodiment. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. In order to make the above purpose, features and advantages of the application more obvious and easy to understand, a lot of specific details are described in the following description to facilitate the full understanding of the application. But the application can be implemented in many other ways different from the description, and those skilled in the art can make similar improvements without departing from the connotation of the application, therefore the application is not limited by the following disclosed specific embodiments.

[0027] Referring to Figures 1-4 A cartridge valve opening adjusting device, including adjusting rod assembly 7 that axially active setting on cartridge valve cover 2, adjusting rod assembly 7 includes adjusting rod 1 and adjusting screw rod 3 that detachable installation is on adjusting rod 1;

[0028] The adjusting screw rod 3 and the cartridge valve cover 2 are provided with an axial adjusting part 8, so that the adjusting rod assembly 7 is axially active on the cartridge valve cover 2 and adjusts the axial position of the adjusting rod assembly 7 on the cartridge valve cover 2;

[0029] The adjusting screw 3 is axially limited and moves between the plug-in valve cover 2 and the limiting block 4.

[0030] By designing the adjusting rod 1 and the adjusting screw 3 as a split structure, the machining difficulty and cost are reduced, the problem of high concentricity requirement of the integral adjusting rod assembly 7 is solved, and the maintainability and replacement convenience of the adjusting rod assembly 7 are improved.

[0031] The axial adjusting part 8 includes a threaded hole 22 arranged on the plug-in valve cover 2 and an adjusting segment threaded segment 31 arranged on the adjusting screw 3, and the adjusting screw 3 is axially moved on the plug-in valve cover 2 through the threaded cooperation between the adjusting segment threaded segment 31 and the threaded hole 22. The threaded cooperation design enables the adjusting screw 3 to be accurately axially moved on the plug-in valve cover 2, thereby realizing fine adjustment of the valve core opening and improving the control precision and stability.

[0032] The adjusting screw 3 and the limiting block 4 are provided with a fastening cooperation part 9 and a locking fastener 6 cooperating with the fastening cooperation part 9.

[0033] In the embodiment, the locking fastener 6 is a locking nut.

[0034] The adjusting screw 3 is connected with the limiting block 4 through the fastening cooperation part 9, and the adjusting screw 3 is fixed on the limiting block 4 under the locking action of the locking fastener 6; the locking fastener 6 releases the locking force, and the adjusting screw 3 is axially moved on the limiting block 4 along the fastening cooperation part 9.

[0035] The fastening cooperation part 9 includes a fastening threaded segment 33 arranged on the adjusting screw 3 and a connecting hole 43 arranged on the limiting block 4, the fastening threaded segment 33 of the adjusting screw 3 is inserted into the connecting hole 43 of the limiting block 4, and the locking fastener 6 is fixedly connected with the fastening threaded segment 33 to lock the adjusting screw 3 on the limiting block 4. The locking fastener 6 is arranged outside the fastening threaded segment 33.

[0036] The adjusting screw 3 and the limiting block 4 are provided with a limiting part 10, and the adjusting screw 3 is axially limited and moves between the plug-in valve cover 2 and the limiting block 4 through the limiting part 10.

[0037] The limiting part 10 includes a shoulder 32 arranged on the adjusting screw 3 and a limiting step 44 arranged on the limiting block 4, and the shoulder 32 moves along the direction of the limiting step 44 in the axial adjusting process of the adjusting screw 3, and the limiting step 44 forms a anti-disengagement part for preventing the adjusting screw 3 from disengaging outwardly from the limiting block 4.

[0038] When the adjusting screw 3 is rotated out to a certain position, the limiting block 4 installed on the plug-in valve cover 2 blocks the shoulder 32 of the adjusting screw 3, limiting the adjusting screw 3 from being rotated out and falling off. The huge hydraulic pressure on the valve core is still acting on the socket valve cover 2 and will not be transferred to other parts. The existing mounting plate only needs to overcome the force of rotating out the adjusting screw by hand. The size of the mounting plate and the size of the fastening screw are very small. The size and structure of the plug-in valve cover do not need to be adjusted, avoiding the problems of bulky structure, high cost, and difficult installation.

[0039] The limiting block 4 is provided with an adjusting hole 41 and a connecting hole 43 matched with the adjusting screw 3. The adjusting hole 41 and the connecting hole 43 are in communication with each other. The adjusting screw 3 is inserted into the adjusting hole 41 and the connecting hole 43 of the limiting block 4.

[0040] The design of the adjusting hole 41 and the connecting hole 43 allows the adjusting screw 3 to be smoothly adjusted in the axial direction in the limiting block 4. At the same time, the limiting step 44 prevents the adjusting screw 3 from accidentally falling off, improving the reliability and safety of the device.

[0041] The diameter of the adjusting hole 41 is greater than the diameter of the connecting hole 43, so that the limiting step 44 is formed between the adjusting hole 41 and the connecting hole 43.

[0042] The diameter of the adjusting hole 41 is greater than the diameter of the shoulder 32. The adjusting hole 41 and the shoulder 32 are in clearance fit. The limiting block 4 is fixed on the outside of the plug-in valve cover 2. The shoulder 32 is limited to move between the outside of the valve cover 2 and the adjusting hole 41 during the axial adjustment of the adjusting screw 3.

[0043] The clearance fit design of the adjusting hole 41 and the shoulder 32 allows the adjusting screw 3 to move smoothly during the axial adjustment.

[0044] The diameter of the connecting hole 43 is smaller than the diameter of the shoulder 32. The design that the diameter of the connecting hole 43 is smaller than the diameter of the shoulder 32 ensures that the adjusting screw 3 will not fall off the limiting block 4 during the axial adjustment, improving the safety and reliability of the device.

[0045] The plug-in valve cover 2 is provided with a fitting hole 21 matched with the adjusting rod 1. The adjusting rod 1 is inserted into the fitting hole 21 of the plug-in valve cover 2.

[0046] The design of the fitting hole 21 allows the adjusting rod 1 to be stably installed on the plug-in valve cover 2. The adjusting rod assembly 7 is designed as two parts, which are machined separately. This ensures the concentricity of the adjusting rod 1 and the plug-in valve cover 2, improving the accuracy and stability of the device.

[0047] The plug-in valve cover 2 is provided with a fastening hole 23, the limiting block 4 is provided with a locking hole 42, and the fastening hole 23 and the locking hole 42 are provided with a fastening component 5.

[0048] The cooperation of the fastening hole 23 and the locking hole 42 enables the limiting block 4 to be firmly fixed on the plug-in valve cover 2, ensures the stability and reliability of the adjusting screw 3, and improves the overall performance and service life of the device.

[0049] In the embodiment, the fastening component 5 is a fastening bolt.

[0050] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A plug valve opening regulating device comprising a regulating lever assembly (7) axially movably arranged on a plug valve cover (2), characterized in that: The adjusting rod assembly (7) comprises an adjusting rod (1) and an adjusting screw rod (3) detachably mounted on the adjusting rod (1); An axial adjusting part (8) is arranged between the adjusting screw rod (3) and the plug-in valve cover (2) to enable the adjusting rod assembly (7) to axially move on the plug-in valve cover (2) and adjust the axial position of the adjusting rod assembly (7) on the plug-in valve cover (2); A limiting block (4) is arranged on one side of the plug-in valve cover (2) corresponding to the adjusting screw rod (3) to limit the adjusting stroke of the adjusting screw rod (3), and the adjusting screw rod (3) is axially limited to move between the plug-in valve cover (2) and the limiting block (4).

2. The plug valve stem positioner of claim 1, wherein: The axial adjusting part (8) comprises a threaded hole (22) arranged on the plug-in valve cover (2) and an adjusting segment threaded segment (31) arranged on the adjusting screw rod (3), and the adjusting screw rod (3) is axially moved on the plug-in valve cover (2) through the threaded cooperation between the adjusting segment threaded segment (31) and the threaded hole (22).

3. The plug valve stem positioner of claim 1, wherein: A fastening cooperation part (9) is arranged between the adjusting screw rod (3) and the limiting block (4), and a locking fastener (6) cooperates with the fastening cooperation part (9); The adjusting screw rod (3) is connected with the limiting block (4) through the fastening cooperation part (9), and the adjusting screw rod (3) is fixed on the limiting block (4) under the locking action of the locking fastener (6); when the locking fastener (6) releases the locking force, the adjusting screw rod (3) is axially moved on the limiting block (4) along the fastening cooperation part (9).

4. The plug valve stem positioner of claim 3, wherein: The fastening cooperation part (9) comprises a fastening threaded segment (33) arranged on the adjusting screw rod (3) and a connecting hole (43) arranged on the limiting block (4), the fastening threaded segment (33) of the adjusting screw rod (3) is inserted into the connecting hole (43) of the limiting block (4), and the locking fastener (6) is fixedly connected with the fastening threaded segment (33) to lock the adjusting screw rod (3) on the limiting block (4).

5. The plug valve stem positioner of claim 1, wherein: A limiting part (10) is arranged between the adjusting screw rod (3) and the limiting block (4), and the adjusting screw rod (3) is axially limited to move between the plug-in valve cover (2) and the limiting block (4) through the limiting part (10).

6. The plug valve stem positioner of claim 5, wherein: The limiting part (10) comprises a shoulder (32) arranged on the adjusting screw rod (3) and a limiting step (44) arranged on the limiting block (4), and the shoulder (32) moves along the direction of the limiting step (44) during the axial adjustment of the adjusting screw rod (3), and the limiting step (44) forms an anti-extraction part for preventing the adjusting screw rod (3) from being extracted out of the limiting block (4).

7. The plug valve stem positioner of claim 6, wherein: The limiting block (4) is provided with an adjusting hole (41) and a connecting hole (43) cooperating with the adjusting screw rod (3), and the adjusting hole (41) and the connecting hole (43) are in communication with each other, and the adjusting screw rod (3) is inserted into the adjusting hole (41) and the connecting hole (43) of the limiting block (4); The diameter of the adjusting hole (41) is greater than the diameter of the connecting hole (43) to form the limiting step (44) between the adjusting hole (41) and the connecting hole (43).

8. The plug valve stem positioner of claim 7, wherein: The adjusting hole (41) is larger in diameter than the shoulder (32), the adjusting hole (41) is in clearance fit with the shoulder (32), the limiting block (4) is fixed on the outside of the plug-in valve cover (2), and the shoulder (32) is limited to move between the outside of the valve cover (2) and the adjusting hole (41) during the axial adjustment of the adjusting screw (3).

9. The plug valve stem positioner of claim 7, wherein: The connecting hole (43) is smaller in diameter than the shoulder (32).

10. The plug valve stem positioner of claim 1, wherein: The plug-in valve cover (2) is provided with an assembly hole (21) matched with the adjusting rod (1), and the adjusting rod (1) is inserted into the assembly hole (21) of the plug-in valve cover (2). The plug-in valve cover (2) is provided with a fastening hole (23), the limiting block (4) is provided with a locking hole (42), and the fastening hole (23) and the locking hole (42) are provided with a fastening component (5). The fastening component (5) is inserted into the fastening hole (23) and the locking hole (42) so that the limiting block (4) is fixed on the plug-in valve cover (2).

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