A testing device for high-strength ball valve castings

Abstract

This utility model discloses a testing device for high-strength ball valve castings, relating to the field of ball valve testing technology. It solves the problem that during sealing, the tooling does not fit tightly against the flange surface of the casting, affecting the accuracy of the testing results. The testing device for high-strength ball valve castings includes: a base; the base adopts a rectangular plate structure; a fixed plate of rectangular plate structure is fixedly installed on the top right side of the base; a set of cylindrical first sliding rods are slidably installed in the circular through grooves on both sides of the fixed plate; a blocking plate of an annular plate structure is fixedly installed at the front end of the two sets of first sliding rods; a T-shaped plate structure upper plate is fixedly installed on the top of the blocking plate; a cylindrical second sliding rod is fixedly installed on the front side of the upper plate; a set of arc-shaped sealing plates are slidably installed on both sides of the second sliding rod; this avoids the false sealing problem caused by uneven force in traditional manual operation, ensuring the authenticity and reliability of the testing results.

Description

Technical Field

[0001] This utility model belongs to the field of ball valve testing technology, and more specifically, it relates to a testing device for high-strength ball valve castings. Background Technology

[0002] In industries such as petrochemicals, power energy, metallurgy, and mining, high-strength ball valves are key equipment for controlling the transportation of high-temperature, high-pressure, and highly corrosive media. The sealing performance of their castings (such as valve bodies and valve covers) directly determines the safe operation of the entire system. If there are even minor sealing defects in the ball valve castings, it may lead to media leakage under high-pressure conditions, causing energy waste, environmental pollution, or even major safety accidents such as explosions and poisoning. Therefore, it is necessary to inspect the quality of ball valve castings.

[0003] Current detection devices still have the following shortcomings:

[0004] When manually operating the sealing fixture, uneven clamping force can easily lead to "local seal failure," meaning that the fixture does not fit tightly against the casting flange surface. This results in a false pressure stability during testing, while micro-leakage actually exists, leading to a high misjudgment rate, affecting the accuracy of test results, and hindering product quality control. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a testing device for high-strength ball valve castings. This device solves the problem mentioned in the background art where uneven clamping force applied during manual operation of the sealing fixture easily leads to "local seal failure," meaning the fixture does not fit tightly against the casting flange surface, resulting in false pressure stability during testing while micro-leakage actually exists. This leads to a high misjudgment rate, affecting the accuracy of the test results and hindering product quality control.

[0006] The purpose and effectiveness of this utility model's testing device for high-strength ball valve castings are achieved through the following specific technical means:

[0007] A testing device for high-strength ball valve castings includes: a base; the base adopts a rectangular plate structure; a fixed plate of rectangular plate structure is fixedly installed on the top right side of the base, and both sides of the fixed plate have through circular groove structures; a set of cylindrical first slide rods are slidably installed in the circular grooves on both sides of the fixed plate; a blocking plate of annular plate structure is fixedly installed at the front end of the two sets of first slide rods; a top plate of T-shaped plate structure is fixedly installed on the top of the blocking plate; a cylindrical second slide rod is fixedly installed on the front side of the top plate; a set of arc-shaped sealing plates are slidably installed on both sides of the second slide rods, and a rectangular groove structure is opened on one side of the sealing plate, the inner wall of the sealing plate is in contact with the outer wall of the blocking plate; an arc-shaped sliding plate is slidably installed in the rectangular groove on one side of the sealing plate, and a through screw hole structure is opened on one side of the sliding plate, the outer wall of the sliding plate is in close contact with the inner wall of the sealing plate.

[0008] Furthermore, a cylindrical connecting shaft is rotatably connected to one side of the top of the base; a worm gear is fixedly installed at the bottom end of the connecting shaft; a worm is rotatably installed on one side of the bottom of the base, and the worm is meshed with the worm gear; a first motor is fixedly installed on one side of the bottom of the base, and the first motor is connected to the worm gear drive.

[0009] Furthermore, a U-shaped plate structure is fixedly installed on the top of the connecting shaft, and a U-shaped groove structure is provided on the top of the top plate; a set of U-shaped plate structure fixing frames are fixedly installed on both sides of the top of the top plate, and a through circular groove structure is provided in the middle of one side of the fixing frame; a first cylinder is fixedly installed on one side of the fixing frame; a circular plate structure clamping block is fixedly installed on the inner end of the first cylinder, and an arc-shaped groove structure is provided on the inner side of the clamping block.

[0010] Furthermore, a buffer tank is fixedly connected to the right side of the blocking plate; a pressure pump is fixedly connected to the right side of the buffer tank; a sensor is fixedly connected to the top of the upper plate, and the sensor is connected to the inside of the buffer tank.

[0011] Furthermore, a lower plate is fixedly installed at the bottom of the blocking plate; a bidirectional lead screw is rotatably installed on the inner side of the lower plate, and the bidirectional lead screw is connected to two sets of sealing plates by threaded engagement; a second motor is fixedly installed on one side of the lower plate, and the second motor is drivenly connected to the bidirectional lead screw.

[0012] Furthermore, a screw is rotatably installed in the rectangular groove of the sealing plate, and the screw is connected to the sliding plate by a threaded connection; a set of second cylinders is fixedly installed on both the upper and lower sides of one side of the fixed plate, and the two sets of second cylinders are respectively connected to the upper plate and the lower plate for transmission.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The system employs a dual sealing structure consisting of "initial sealing with a plugging plate + reinforcement with a sealing plate and a sliding plate." Through flexible contact and uniform clamping, it ensures a tight fit between the tooling and the casting flange surface, avoiding the false sealing problem caused by uneven force in traditional manual operations. The pressure stabilization design of the buffer tank can effectively suppress pressure fluctuations. Combined with a sensor for real-time pressure monitoring, it can accurately detect minute leaks, ensuring the authenticity and reliability of the test results.

[0015] With the help of the automatic flipping mechanism of worm gear transmission, the switching between the two ends of the inspection can be completed without disassembling the casting, eliminating the tedious steps of repeatedly disassembling and assembling tooling in traditional inspection; the sealing adjustment system driven by cylinder and motor realizes the rapid positioning and adaptation of sealing components, which greatly shortens the overall time of single-piece inspection and is more suitable for the high-efficiency quality inspection needs of mass production.

[0016] The bidirectional screw-driven sealing plate allows for flexible spacing adjustment, while the screw-controlled sliding plate can accommodate flanges of different thicknesses. This eliminates the need for dedicated molds for castings of different specifications, reducing mold procurement and replacement costs. At the same time, it avoids downtime losses caused by frequent mold changes, thus improving the overall utilization efficiency of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall axial view structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the overall bottom view of this utility model.

[0019] Figure 3 This is a schematic diagram of the connection relationship between the fixing plate and the sealing plate of this utility model.

[0020] Figure 4 This is a schematic diagram of the connection relationship between the connecting shaft and the top plate of this utility model.

[0021] Figure 5 This is a schematic diagram of the disassembled structure of the blocking plate and sealing plate of this utility model.

[0022] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Base; 101. Connecting shaft; 102. Worm gear; 103. Worm; 104. First motor; 105. Top plate; 106. Fixing frame; 107. First cylinder; 108. Clamping block; 109. Fixing plate; 110. First slide rod; 111. Blocking plate; 112. Buffer tank; 113. Pressure pump; 114. Upper plate; 115. Sensor; 116. Second slide rod; 117. Lower plate; 118. Bidirectional lead screw; 119. Second motor; 120. Sealing plate; 121. Sliding plate; 122. Screw; 123. Second cylinder. Detailed Implementation

[0024] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0025] Example 1: As shown in the attached document Figure 1 To be continued Figure 5 As shown:

[0026] This utility model provides a testing device for high-strength ball valve castings, comprising: a base 1; the base 1 adopts a rectangular plate structure; a fixed plate 109 of rectangular plate structure is fixedly installed on the top right side of the base 1, and both sides of the fixed plate 109 are provided with through circular groove structures; a set of cylindrical first slide rods 110 are slidably installed in the circular grooves on both sides of the fixed plate 109; a blocking plate 111 of an annular plate structure is fixedly installed at the front end of the two sets of first slide rods 110, the inner diameter of which is adapted to the port diameter of the ball valve casting, for sealing the port of the ball valve casting; the blocking plate 111 A T-shaped upper plate 114 is fixedly installed at the top; a cylindrical second slide rod 116 is fixedly installed on the front side of the upper plate 114; a set of arc-shaped sealing plates 120 are slidably installed on both sides of the second slide rod 116, and a rectangular groove structure is opened on one side of the sealing plate 120, and the inner wall of the sealing plate 120 is in contact with the outer wall of the blocking plate 111; an arc-shaped sliding plate 121 is slidably installed in the rectangular groove on one side of the sealing plate 120, and a through-hole structure is opened on one side of the sliding plate 121, and the outer wall of the sliding plate 121 is in close contact with the inner wall of the sealing plate 120.

[0027] The buffer tank 112 is fixedly connected to the right side of the blocking plate 111. It is a pressure-resistant container that can buffer and stabilize the pressure output by the pressure pump 113, so as to avoid the impact of pressure fluctuation on the test results. Its volume is designed according to the test pressure and flow requirements. The pressure pump 113 is fixedly connected to the right side of the buffer tank 112. A sensor 115 is fixedly installed on the top of the upper plate 114 and is connected to the inside of the buffer tank 112, which can monitor the pressure changes inside the buffer tank 112 in real time.

[0028] The bottom of the blocking plate 111 is fixedly provided with a lower plate 117; a bidirectional lead screw 118 is rotatably provided on the inner side of the lower plate 117, and the bidirectional lead screw 118 is respectively connected to the two sets of sealing plates 120 by thread engagement; a second motor 119 is fixedly provided on one side of the lower plate 117, and the second motor 119 is connected to the bidirectional lead screw 118 for transmission. The second motor 119 can precisely control the rotation angle of the bidirectional lead screw 118, thereby realizing the precise movement of the sealing plate 120.

[0029] The sealing plate 120 has a screw 122 rotatably mounted in the rectangular groove, and the screw 122 is connected to the sliding plate 121 by a threaded connection, which facilitates the adjustment of the position of the sliding plate 121 to adapt to the port of the ball valve casting of different thicknesses. A set of second cylinders 123 are fixedly mounted on the upper and lower sides of one side of the fixed plate 109, and the two sets of second cylinders 123 are respectively connected to the upper plate 114 and the lower plate 117, which can drive the blocking plate 111 to move smoothly as a whole, so as to achieve precise sealing of the port of the ball valve casting.

[0030] The specific usage and function of this embodiment are as follows:

[0031] The ball valve casting to be tested is placed in the U-shaped groove of the top plate 105, with one end of the casting facing the blocking plate 111. The first cylinder 107 is activated, driving the two sets of clamping blocks 108 to move inward synchronously until the arc-shaped groove fits against the outer wall of the casting, completing the clamping. The second cylinder 123 is activated, pushing the blocking plate 111, the upper plate 114, and the lower plate 117 forward along the first slide rod 110, so that the annular blocking plate 111 fits against the casting end, initially completing the sealing. According to the thickness of the ball valve casting, the screw 122 is manually rotated, causing the sliding plate 121 to slide along the rectangular groove of the sealing plate 120, so that the width between the inner wall of the sliding plate 121 and the sealing plate 120 matches the thickness of the blocking plate 111 and the flange at one end of the ball valve casting. Then, the cylinder is activated. The second motor 119 is activated, driving the bidirectional lead screw 118 to rotate. This causes the two sets of sealing plates 120 to slide along the second slide rod 116, allowing the two sets of sealing plates 120 to be fitted onto the outside of the plug plate 111 and the ball valve casting flange from both sides. This further enhances the sealing performance of the plug plate 111 and the ball valve flange, meeting the requirements of high-intensity testing while ensuring the accuracy of the testing results. Then, the pressure pump 113 is started, injecting the testing medium into the casting through the buffer tank 112. The buffer tank 112 can stabilize pressure fluctuations. When the sensor 115 detects that the pressure has reached the preset pressure, the pressure pump 113 stops working and enters the pressure holding stage. The sensor 115 continuously monitors the pressure. When the testing time is reached, the testing process at one end is completed.

[0032] Example 2: Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 5 As shown:

[0033] The base 1 has a cylindrical connecting shaft 101 rotatably connected to one side of its top; a worm gear 102 is fixedly installed at the bottom end of the connecting shaft 101; a worm 103 is rotatably installed on one side of the bottom of the base 1, and the worm 103 is meshed with the worm gear 102. Through the self-locking characteristic of the worm gear 102 and worm 103 transmission, the connecting shaft 101 can be accurately positioned to prevent rotation during the inspection process; a first motor 104 is fixedly installed on one side of the bottom of the base 1, and the first motor 104 is connected to the worm 103 for transmission, which can accurately control the rotation angle of the worm 103, thereby achieving accurate rotation of the connecting shaft 101 and meeting the requirements for different angle inspections of ball valve castings.

[0034] The top of the connecting shaft 101 is fixedly equipped with a U-shaped plate structure top plate 105, and the top of the top plate 105 is provided with a U-shaped groove structure for supporting the ball valve casting. The inner wall of the U-shaped groove is attached with a wear-resistant rubber pad, which can prevent the surface of the casting from being scratched and increase friction to improve positioning stability. A set of U-shaped plate structure fixing brackets 106 are fixedly equipped on both sides of the top of the top plate 105, and a through circular groove structure is provided in the middle of one side of the fixing bracket 106. A first cylinder 107 is fixedly equipped on one side of the fixing bracket 106. A circular plate structure clamping block 108 is fixedly equipped on the inner end of the first cylinder 107, and an arc-shaped groove structure is provided on the inner side of the clamping block 108. Through the synchronous extension and retraction movement of the two sets of first cylinders 107, the two sets of clamping blocks 108 are driven to move, and the casting is fixedly clamped from both sides, which can realize the clamping and fixing of ball valve castings of different diameters.

[0035] The specific usage and function of this embodiment are as follows:

[0036] In this invention, when the other end needs to be tested, the connection and fixation with the ball valve are released in reverse order. The first motor 104 is started, which drives the worm gear 103 to rotate. Through the worm gear 103 and worm wheel 102, the connecting shaft 101 is rotated 180°, so that the other end of the casting faces the blocking plate 111. Then, the same steps are followed to perform the test again. This facilitates the quick replacement of different test ports and greatly improves the testing efficiency.

Claims

1. An inspection apparatus for high-strength ball valve castings, characterized by comprising: include: Base (1); The base (1) adopts a rectangular plate structure; A rectangular plate structure fixing plate (109) is fixedly installed on the top right side of the base (1), and a through circular groove structure is opened on both sides of the fixing plate (109); A set of cylindrical first slide rods (110) are slidably installed in the circular grooves on both sides of the fixing plate (109); A circular ring plate structure blocking plate (111) is fixedly installed at the front end of the two sets of first slide rods (110); A T-shaped plate structure upper plate (114) is fixedly installed on the top of the blocking plate (111); The front side of the upper plate (114) A second slide rod (116) with a cylindrical structure is fixedly installed; a set of arc-shaped sealing plates (120) are slidably installed on both sides of the second slide rod (116), and a rectangular groove structure is opened on one side of the sealing plate (120), and the inner wall of the sealing plate (120) is in contact with the outer wall of the blocking plate (111); an arc-shaped sliding plate (121) is slidably installed in the rectangular groove on one side of the sealing plate (120), and a through-hole structure is opened on one side of the sliding plate (121), and the outer wall of the sliding plate (121) is in close contact with the inner wall of the sealing plate (120).

2. The apparatus for inspecting a high-strength ball valve casting according to claim 1, wherein: A cylindrical connecting shaft (101) is rotatably connected to one side of the top of the base (1); a worm wheel (102) is fixedly provided at the bottom end of the connecting shaft (101); a worm (103) is rotatably provided on one side of the bottom of the base (1), and the worm (103) is meshed with the worm wheel (102); a first motor (104) is fixedly provided on one side of the bottom of the base (1), and the first motor (104) is connected to the worm (103) in a transmission connection.

3. The apparatus for inspecting a high-strength ball valve casting according to claim 2, wherein: The top of the connecting shaft (101) is fixedly provided with a top plate (105) of U-shaped plate structure, and the top of the top plate (105) is provided with a U-shaped groove structure; a set of U-shaped plate structure fixing brackets (106) are fixedly provided on both sides of the top of the top plate (105), and a through circular groove structure is provided in the middle of one side of the fixing bracket (106).

4. The apparatus for inspecting a high-strength ball valve casting according to claim 3, wherein: A first cylinder (107) is fixedly installed on one side of the fixed frame (106); a circular plate-shaped clamping block (108) is fixedly installed on the inner end of the first cylinder (107), and an arc-shaped groove structure is opened on the inner side of the clamping block (108).

5. The apparatus for inspecting a high-strength ball valve casting according to claim 1, wherein: A buffer tank (112) is fixedly connected to the right side of the blocking plate (111); a pressure pump (113) is fixedly connected to the right side of the buffer tank (112); a sensor (115) is fixedly connected to the top of the upper plate (114), and the sensor (115) is connected to the inside of the buffer tank (112).

6. The apparatus for inspecting a high-strength ball valve casting according to claim 1, wherein: The bottom of the blocking plate (111) is fixedly provided with a lower plate (117); a double-acting screw (118) is rotatably provided on the inner side of the lower plate (117), and the double-acting screw (118) is connected to the two sets of sealing plates (120) respectively by threaded engagement; a second motor (119) is fixedly provided on one side of the lower plate (117), and the second motor (119) is connected to the double-acting screw (118) for transmission.

7. The testing device for high-strength ball valve castings as described in claim 1, characterized in that: A screw (122) is rotatably installed in the rectangular groove of the sealing plate (120), and the screw (122) is connected to the sliding plate (121) by a threaded connection; a set of second cylinders (123) are fixedly installed on the upper and lower sides of one side of the fixed plate (109), and the two sets of second cylinders (123) are respectively connected to the upper plate (114) and the lower plate (117) for transmission.

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