Main pressure regulating valve anti-pumping locking pin device

Abstract

The utility model relates to the technical field of locking fittings, and particularly discloses a main pressure regulating valve anti-pulling locking pin device, which comprises a pin head part, a moving part, a mounting part and a guide part. The pin head part, the moving part and the mounting part are used in cooperation, at least two groups of butt joints grooves matched with the U-shaped pins are arranged on the piston rod of the main pressure regulating valve spool, the piston rod is switched to different positions, the U-shaped pins are used for limiting and locking the piston rod, and the axial pulling problem of the main pressure regulating valve locking pin is solved.

Description

Technical Field

[0001] This utility model relates to the field of locking accessories technology, specifically to a locking pin device for preventing the main pressure valve from being pulled out. Background Technology

[0002] The main pressure regulating valve is a core hydraulic control component of the power generation equipment speed control system. Its function is to convert the small flow signal from the electro-hydraulic converter or pilot valve into a large flow of hydraulic energy. The main pressure regulating valve mainly consists of a valve body, valve core (piston), bushing, constant pressure chamber, control chamber, oil pipe, and position sensor. The valve core moves under the action of differential pressure, controlling the flow direction and flow rate of the pressurized oil. Under the high-frequency vibration of the system, the piston rod of the valve core is susceptible to alternating hydraulic shock force, resulting in slight displacement along the axial direction.

[0003] A novel main pressure regulating valve disclosed in existing patent publication number CN213928622U includes a pilot valve, a main pressure regulating valve piston, a main pressure regulating valve bushing, and a main pressure regulating valve housing. The main pressure regulating valve bushing has a constant pressure chamber inside, and the main pressure regulating valve piston is slidably connected within the constant pressure chamber. The main pressure regulating valve bushing is fixed to the lower side of the main pressure regulating valve housing. The pilot valve is embedded in the upper end of the main pressure regulating valve piston and is an integral structure with the piston. While the pilot valve and piston are integrated and can be adjusted, they lack further limiting and locking mechanisms, leading to axial pulling under alternating hydraulic impact forces. To address these issues, a main pressure regulating valve anti-pulling locking pin device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a locking pin device for preventing the main pressure valve from being pulled out, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] The main pressure regulating valve anti-slip locking pin device includes...

[0007] A pin assembly, comprising a U-shaped pin and a connecting post attached to one side of the U-shaped pin;

[0008] A moving part for driving the pin head to move includes a cylinder and a telescopic rod connected to one side of the cylinder;

[0009] A mounting component for connecting a connecting post and a telescopic rod, comprising a mounting sleeve fixedly connected to the telescopic rod, a rectangular block fixedly connected to the connecting post, and a locking component for securing the mounting sleeve to the rectangular block; and

[0010] Guide components are used to stabilize and guide the installation sleeve during movement.

[0011] In one alternative: both ends of the pin head away from the connecting post are provided with guide slopes, and the guide slopes are inclined to the inner contact surface of the U-shaped pin.

[0012] In one alternative: the mounting sleeve has a mating cavity for inserting a rectangular block, and the outer wall of the rectangular block contacts the inner wall of the mounting sleeve.

[0013] In one alternative: the locking element includes locking bolts, the top and both sides of the mounting sleeve are connected to locking bolts, and the outer wall of the rectangular block is provided with locking screw holes that are threadedly engaged with the locking bolts.

[0014] In one alternative: the guide includes a guide rod fixedly connected to the mounting sleeve near the cylinder side, and guide blocks are connected to both sides of the cylinder, with sliding holes provided in the guide blocks for sliding the guide rod.

[0015] In one alternative: both sides of the cylinder are connected to a fixing plate at the bottom, and the fixing plate is provided with mounting holes.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this utility model, the coordinated use of the central pin, the movable part, and the mounting part allows at least two sets of mating grooves to be opened on the piston rod of the main pressure regulating valve core to engage with the U-shaped pin. This enables the piston rod to switch to different positions, and the U-shaped pin limits and locks the piston rod in each position, thus solving the problem of axial movement of the locking pin of the main pressure regulating valve. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the pin head component limiting the valve core piston rod in this utility model.

[0020] Figure 3 This is a schematic diagram of the mounting component in this utility model.

[0021] Figure 4 This is a schematic diagram of the guide component in this utility model.

[0022] In the diagram: 1. Pin head; 2. Moving part; 3. Mounting part; 4. Guide part; 101. U-shaped pin; 102. Guide slope; 103. Connecting column; 201. Cylinder; 202. Telescopic rod; 203. Fixing plate; 301. Mounting sleeve; 302. Rectangular block; 303. Locking bolt; 304. Locking screw hole; 401. Guide rod; 402. Guide block. Detailed Implementation

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figures 1-4 In this embodiment, the main pressure regulating valve anti-pulling locking pin device includes a pin head 1, which includes a U-shaped pin 101 and a connecting post 103 connected to one side of the U-shaped pin 101; a moving part 2, used to drive the pin head 1 to move, includes a cylinder 201 and a telescopic rod 202 connected to one side of the cylinder 201; when the cylinder 201 is working, the telescopic length of the telescopic rod 202 can be adjusted.

[0026] Mounting component 3 is used to connect connecting post 103 and telescopic rod 202. It includes mounting sleeve 301 fixedly connected to telescopic rod 202, rectangular block 302 fixedly connected to connecting post 103, and locking component for fixing mounting sleeve 301 and rectangular block 302. After the rectangular block 302 is mated with mounting sleeve 301, it is fixed, which facilitates the movement of adjusting pin 1 of moving component 2.

[0027] And guide component 4, used to stabilize and guide the installation sleeve 301 when it moves; to prevent the installation sleeve 301 from moving or deviating too much.

[0028] Please see Figure 1 Both ends of the pin head 1 on the side away from the connecting column 103 are provided with guide slopes 102. The guide slopes 102 are inclined towards the inner contact surface of the U-shaped pin 101. The guide slopes 102 allow the U-shaped pin 101 to be placed into the valve stem engagement position of the pilot valve, reducing the assembly accuracy requirements.

[0029] Please see Figure 3The mounting sleeve 301 has a mating cavity for inserting the rectangular block 302. The outer wall of the rectangular block 302 contacts the inner wall of the mounting sleeve 301. The use of the mounting sleeve 301 and the rectangular block 302 can also convert the thrust of the cylinder 201 into surface pressure, avoiding point stress concentration.

[0030] Furthermore, the locking component includes a locking bolt 303, and the top and both sides of the mounting sleeve 301 are connected to the locking bolt 303. The outer wall of the rectangular block 302 is provided with a locking screw hole 304 that is threadedly engaged with the locking bolt 303. The mounting component 3 can be separated by releasing the locking bolt 303.

[0031] Please see Figure 4 The guide member 4 includes a guide rod 401 fixedly connected to the side of the mounting sleeve 301 near the cylinder 201. Guide blocks 402 are connected to both sides of the cylinder 201. The guide blocks 402 are provided with sliding holes for sliding of the guide rod 401. Specifically, when the mounting sleeve 301 moves, the guide rod 401 slides in the guide block 402, so that the mounting sleeve 301 can be stably adjusted horizontally.

[0032] Please see Figure 3 The cylinder 201 has a fixing plate 203 connected to both bottom sides. The fixing plate 203 is provided with mounting holes. Specifically, screw holes corresponding to the mounting holes can be opened on the main pressure valve or other installation locations where this device needs to be installed. Existing bolts can be used to fix the position of the fixing plate 203, that is, to fix the position of the cylinder 201.

[0033] The working principle of this utility model is as follows: the movable part 2 is fixed on the main pressure regulating valve or other installation location where this device needs to be installed; at least two sets of mating grooves that cooperate with the U-shaped pin 101 can be opened on the piston rod of the main pressure regulating valve core, such as... Figure 2 As shown, when the piston rod is switched to different positions, the U-shaped pin 101 limits and locks the piston rod in each position.

[0034] When cylinder 201 is in operation, the extension and retraction length of telescopic rod 202 can be adjusted, mounting sleeve 301 moves, U-shaped pin 101 is inserted into the valve stem engagement position of the pilot valve, and guide rod 401 slides in guide block 402, so that mounting sleeve 301 can be stably adjusted horizontally.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A locking pin device for preventing pull-out of the main pressure regulating valve, characterized in that, include The pin head (1) includes a U-shaped pin (101) and a connecting post (103) connected to one side of the U-shaped pin (101). The moving part (2) is used to drive the pin head part (1) to move, and includes a cylinder (201) and a telescopic rod (202) connected to one side of the cylinder (201). Mounting component (3), for connecting the connecting post (103) and the telescopic rod (202), includes a mounting sleeve (301) fixedly connected to the telescopic rod (202), a rectangular block (302) fixedly connected to the connecting post (103), and a locking element for fixing the mounting sleeve (301) to the rectangular block (302); and Guide component (4) is used to stabilize the guide when the mounting sleeve (301) moves.

2. The main pressure regulating valve anti-slip locking pin device according to claim 1, characterized in that: The pin head (1) has guide slopes (102) at both ends on the side away from the connecting post (103), and the guide slopes (102) are inclined toward the inner contact surface of the U-shaped pin (101).

3. The main pressure regulating valve anti-slip locking pin device according to claim 1, characterized in that: The mounting sleeve (301) has a mating cavity for inserting a rectangular block (302), and the outer wall of the rectangular block (302) is in contact with the inner wall of the mounting sleeve (301).

4. The main pressure regulating valve anti-slip locking pin device according to claim 1 or 3, characterized in that: The locking component includes a locking bolt (303), and the top and both sides of the mounting sleeve (301) are connected to the locking bolt (303). The outer wall of the rectangular block (302) is provided with a locking screw hole (304) that is threaded to the locking bolt (303).

5. The main pressure regulating valve anti-slip locking pin device according to claim 1, characterized in that: The guide (4) includes a guide rod (401) fixedly connected to the side of the mounting sleeve (301) near the cylinder (201). Guide blocks (402) are connected to both sides of the cylinder (201). The guide blocks (402) are provided with sliding holes for sliding of the guide rod (401).

6. The main pressure regulating valve anti-slip locking pin device according to claim 1, characterized in that: The cylinder (201) has a fixing plate (203) connected to the bottom of both sides, and the fixing plate (203) has mounting holes.

Images