Pump pressure test device for pressure plugging of valve sleeve assembly

Abstract

The utility model discloses a pump pressure test device for valve sleeve assembly pressure plugging, which relates to the field of valve sleeve detection equipment and comprises a frame main body, an oil plugging shaft sleeve is in liftable threaded connection with a top cross beam of the frame main body, and an oil inlet shaft sleeve is mounted at the bottom of the frame main body. The oil inlet shaft sleeve is connected with a high-pressure oil pipe adapter through a pipeline, the high-pressure oil pipe adapter is installed at the bottom of the frame body and connected with a high-pressure oil pipe of an external hydraulic system, and a pump pressure sleeve is detachably installed between the oil inlet shaft sleeve and the oil plugging shaft sleeve. A valve sleeve assembly to be detected is connected in the pump pressure sleeve through an O-shaped sealing ring. The device disclosed by the utility model is simple, compact and practical in structure, low in manufacturing cost and short in period, and lays a powerful foundation for improving quality and efficiency of enterprises.

Description

Technical Field

[0001] This utility model relates to the field of valve sleeve testing equipment, and in particular to a device for testing the pressure of a valve sleeve assembly in a pump. Background Technology

[0002] Electro-hydraulic servo valves are widely used in aviation, aerospace, shipbuilding, metallurgy, chemical and other fields, ensuring precise control and efficient operation of systems. The electro-hydraulic servo valve is a crucial control component in electro-hydraulic servo control systems, playing a role in electro-hydraulic conversion and power amplification. Specifically, during system operation, the electro-hydraulic servo valve directly receives the electrical signals transmitted from the system and converts these signals into proportional signals with corresponding polarity, capable of controlling the load flow or load pressure of the electro-hydraulic servo valve. This allows the system to output significant hydraulic power to match the corresponding actuators. The performance and reliability of the electro-hydraulic servo valve directly affect the performance and reliability of the entire system, making it a critical component of the electro-hydraulic servo control system. Its components include the valve body, valve sleeve, valve core, and motor. These components work together to enable the electro-hydraulic servo valve to adapt to various working conditions, including extreme environments such as high temperature, low temperature, high pressure, low pressure, and strong corrosion. Furthermore, it features a simple structure and convenient maintenance, reducing maintenance costs and downtime.

[0003] The valve sleeve assembly is a key component in the electro-hydraulic servo valve. It consists of a valve sleeve, a receiver, and a plug. The plug is pressed into the plug hole of the valve sleeve with a certain interference fit to seal the oil passage holes through both ends of the valve sleeve, thus forming an internal oil passage channel. The valve sleeve assembly is an important component of the spool valve assembly, which in turn is the core component of the electro-hydraulic servo valve. The nozzle is controlled by a motor to swing back and forth, creating a pressure difference in the nozzle jet column, which drives the valve core to move within the valve sleeve assembly. The opening and closing of the square window hole of the valve core and the valve sleeve assembly linearly controls the flow rate and pressure of the oil passage inside the valve sleeve assembly.

[0004] Leakage due to blockage in the valve sleeve assembly can cause the valve core to deflect or become stuck during operation, thus affecting the flow and pressure control accuracy of the hydraulic system, and even causing system failure and paralysis. Therefore, how to detect whether the valve sleeve assembly is properly sealed and meets product design requirements has become a pressing problem for those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a pressure testing device for valve sleeve assembly pressure plugging pump, which solves the problem of the lack of quality testing equipment for valve sleeve assembly in the existing market, and lays a favorable foundation for enterprises to improve quality and efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] This utility model provides a valve sleeve assembly pressure plugging pump pressure test device, comprising a frame body, a plugging bushing that is retractably threaded onto the top crossbeam of the frame body, an inlet bushing installed at the bottom of the frame body, the inlet bushing being connected to a high-pressure oil pipe adapter via a pipe, the high-pressure oil pipe adapter being installed at the bottom of the frame body and connected to a high-pressure oil pipe of an external hydraulic system, and a pump pressure sleeve detachably installed between the inlet bushing and the plugging bushing, with the valve sleeve assembly to be tested connected inside the pump pressure sleeve via an O-ring seal.

[0008] Optionally, a pressure gauge is installed on the high-pressure oil pipe of the external hydraulic system.

[0009] Optionally, the oil plugging bushing and the oil inlet bushing are coaxially arranged.

[0010] Optionally, an O-ring is installed at the bottom end of the oil plugging bushing, and the oil plugging bushing is connected to the top end of the valve sleeve assembly through the O-ring.

[0011] Optionally, an O-ring is installed at the top of the oil inlet bushing, and the oil inlet bushing is connected to the bottom of the valve sleeve assembly through the O-ring.

[0012] Optionally, multiple oil-blocking bushings are provided, and the number of oil-inlet bushings is the same as the number of oil-blocking bushings.

[0013] Optionally, the oil plugging bushing, the pump pressure sleeve, the O-ring seal, and the oil inlet bushing are each available in various models.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0015] This invention utilizes a combination of an oil-blocking bushing, a pump pressure sleeve, an oil inlet bushing, an O-ring seal, and a high-oil pipe adapter to detect whether the valve sleeve assembly is properly blocked, thus providing convenience for the performance testing of the valve sleeve assembly.

[0016] The device of this utility model has a simple, compact, practical structure, low manufacturing cost, and short production cycle, laying a solid foundation for enterprises to improve quality and efficiency. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of the valve sleeve assembly pressure plugging pump pressure test device of this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of the valve sleeve assembly pressure plugging pump pressure test device of this utility model. Figure 2;

[0020] Figure 3 This is a schematic diagram of the structure of the valve sleeve assembly pressure plugging pump pressure test device of this utility model. Figure 3 ;

[0021] Figure 4 This is a schematic diagram of the structure of the valve sleeve assembly pressure plugging pump pressure test device of this utility model. Figure 4 ;

[0022] Figure 5 This is a schematic diagram of the structure of the valve sleeve assembly pressure plugging pump pressure test device of this utility model. Figure 5 ;

[0023] Figure 6 This is a side view of the valve sleeve assembly pressure plugging pump pressure test device of this utility model;

[0024] Figure 7 This is a top view of the valve sleeve assembly pressure plugging pump pressure test device of this utility model;

[0025] Figure 8 This is a cross-sectional view of the valve sleeve assembly of this utility model;

[0026] Figure 9 This is a schematic diagram showing the connection relationship between the valve sleeve assembly of this utility model and the pump pressure sleeve, the oil plugging sleeve, and the oil inlet sleeve.

[0027] Explanation of reference numerals in the attached drawings: 1. Frame body; 2. Oil plug bushing; 3. Pump pressure sleeve; 4. Valve sleeve assembly; 5. O-ring seal; 6. Oil inlet bushing; 7. High oil pipe adapter. Detailed Implementation

[0028] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0029] like Figure 1-9 The present invention relates to a valve sleeve assembly pressure plugging pump pressure testing device, comprising a frame body 1, a plugging bushing 2 being threadedly connected to the top crossbeam of the frame body 1, an inlet bushing 6 being installed at the bottom of the frame body 1, the inlet bushing 6 being connected to a high-pressure oil pipe adapter 7 via a pipe, the high-pressure oil pipe adapter 7 being installed at the bottom of the frame body 1 and connected to a high-pressure oil pipe of an external hydraulic system, a pump pressure sleeve 3 being detachably installed between the inlet bushing 6 and the plugging bushing 2, and a valve sleeve assembly 4 to be tested being connected inside the pump pressure sleeve 3 via an O-ring seal 5.

[0030] The frame body 1 is made of carbon structural steel 45# steel through turning, milling and grinding to ensure the overall assembly accuracy of the device. In addition, the surface of the frame body 1 is bluing to solve the problem of corrosion and rust, and to improve the service life of the frame body 1.

[0031] The O-ring 5 is made of nitrile rubber, which has high temperature resistance, corrosion resistance, and wear resistance, ensuring sealing throughout the test. When installing the O-ring 5 onto the valve sleeve assembly 4, lubricant is first applied to the valve sleeve assembly 4, and then the O-ring 5 is installed into the groove on the valve sleeve assembly 4. The O-ring 5 provides a static seal with a compression range of 15% to 30%.

[0032] The valve sleeve assembly 4 and the pump sleeve 3 are fitted with a clearance, with a minimum clearance of 0.02 and a maximum clearance of 0.062.

[0033] Specifically, a pressure gauge is installed on the high-pressure oil pipe of the external hydraulic system.

[0034] Specifically, the oil-blocking bushing 2 and the oil-inlet bushing 6 are coaxially arranged.

[0035] Specifically, an O-ring seal 5 is installed at the bottom end of the oil-plugging bushing 2, and the oil-plugging bushing 2 is connected to the top end of the valve sleeve assembly 4 through the O-ring seal 5. The oil-plugging bushing 2 and the valve sleeve assembly 4 are fitted with a clearance fit, with a minimum clearance of 0.01 and a maximum clearance of 0.045.

[0036] Specifically, an O-ring seal 5 is installed at the top of the oil inlet bushing 6, and the oil inlet bushing 6 is connected to the bottom of the valve sleeve assembly 4 through the O-ring seal 5. The oil inlet bushing 6 and the valve sleeve assembly 4 are clearance-fitted, with a minimum clearance of 0.01 and a maximum clearance of 0.045.

[0037] Specifically, multiple oil-blocking bushings 2 are provided, and the number of oil-inlet bushings 6 is the same as the number of oil-blocking bushings 2.

[0038] In practice, four oil-blocking bushings 2 are provided, allowing for the inspection of four valve sleeve assemblies 4 at a time, thus improving testing efficiency.

[0039] Specifically, the oil plugging bushing 2, the pump pressure sleeve 3, the O-ring seal 5, and the oil inlet bushing 6 are each provided with multiple models, and the part sizes of each model are different, so as to meet the test requirements of different models of valve sleeve assembly 4 and improve test efficiency.

[0040] Only the O-ring 5 is a consumable in the entire test apparatus. Its low cost makes the test apparatus inexpensive to use and easy to maintain.

[0041] The usage process of this utility model is as follows:

[0042] Step 1: As Figure 2-3 As shown, after applying lubricating oil, the O-ring 5 is installed in the rubber ring groove of the valve sleeve assembly 4;

[0043] Step Two: As Figure 4 As shown, the valve sleeve assembly 4 is pressed into the pump sleeve 3;

[0044] Step 3: As Figure 5 As shown, the pump sleeve 3 is installed on the oil inlet sleeve 6;

[0045] Step Four: As Figure 1 As shown, manually rotate the oil plug sleeve 2. Since the oil plug sleeve 2 is threadedly connected to the top crossbeam of the frame body 1, the oil plug sleeve 2 rises or falls when rotating. Here, the oil plug sleeve 2 is lowered so that the bottom end of the oil plug sleeve 2 is screwed into the main hole of the valve sleeve assembly 4 to achieve a sealing effect.

[0046] Step 5: Operate the external hydraulic system to supply hydraulic oil through the high-pressure oil pipe adapter 7 and the oil inlet sleeve 6 into the oil passage of the valve sleeve assembly 4. Pressurize to 42MPa and hold for about 5 minutes. Observe whether there is any hydraulic oil leakage at the plugs at both ends of the valve sleeve assembly 4. If there is hydraulic oil leakage at both ends of the valve sleeve assembly 4, the pressure plug is considered unqualified. If there is no hydraulic oil leakage at both ends of the valve sleeve assembly 4, the pressure plug is considered qualified. Alternatively, the pressure plug of the valve sleeve assembly 4 can be judged by the pressure gauge reading. If the pressure gauge reading is maintained above 40MPa, the pressure plug is considered qualified; otherwise, it is unqualified.

[0047] The working pressure of valve sleeve assembly 4 is around 21MPa. The test pressure of this test device is 42MPa, which is twice the working pressure of valve sleeve assembly 4. This test device is used to test whether the pressure plug of valve sleeve assembly 4 is qualified, which can ensure that valve sleeve assembly 4 provides stable performance guarantee in the operation of electro-hydraulic servo valve.

[0048] The device of this utility model has a simple, compact, practical structure, low manufacturing cost, and short production cycle, laying a solid foundation for enterprises to improve quality and efficiency.

[0049] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0050] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A valve cage assembly compression packing pump test device, comprising: The frame body (1) has a threaded connection on the top crossbeam of the frame body (1) that can be raised and lowered, and an oil-blocking bushing (2) is installed at the bottom of the frame body (1). The oil-inlet bushing (6) is connected to the oil-inlet bushing (6) through a pipe and a high-pressure oil pipe adapter (7). The high-pressure oil pipe adapter (7) is installed at the bottom of the frame body (1) and connected to the high-pressure oil pipe of the external hydraulic system. A pump sleeve (3) is detachably installed between the oil-inlet bushing (6) and the oil-blocking bushing (2). The valve sleeve assembly (4) to be tested is connected inside the pump sleeve (3) through an O-ring seal (5).

2. The pressure test device for valve cage assembly compression packing test according to claim 1, characterized in that: A pressure gauge is installed on the high-pressure oil pipe of the external hydraulic system.

3. The pressure test device for valve cage assembly compression packing test of claim 1, wherein: The oil-blocking bushing (2) and the oil-inlet bushing (6) are coaxially arranged.

4. The pressure test device for valve cage assembly compression packing test of claim 1, wherein: The bottom end of the oil plugging bushing (2) is equipped with an O-ring seal (5), and the oil plugging bushing (2) is connected to the top end of the valve sleeve assembly (4) through the O-ring seal (5).

5. The pressure test device for valve cage assembly compression packing test of claim 1, wherein: The top end of the oil inlet bushing (6) is equipped with an O-ring seal (5), and the oil inlet bushing (6) is connected to the bottom end of the valve sleeve assembly (4) through the O-ring seal (5).

6. The device for testing the pressure of a valve sleeve assembly for pump pressure blocking according to claim 1, characterized in that: Multiple oil-blocking bushings (2) are provided, and the number of oil-inlet bushings (6) is the same as the number of oil-blocking bushings (2).

7. The device for testing the pressure of a valve sleeve assembly for pump pressure blocking according to claim 1, characterized in that: The oil plugging bushing (2), the pump pressure sleeve (3), the O-ring seal (5), and the oil inlet bushing (6) are each available in various models.

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