A ball valve shell strength test device

Abstract

The present invention discloses a ball valve shell strength test device, which relates to the field of ball valve technology, including a test bench, on which a support seat for supporting the ball valve shell is installed, and two detection components are also installed on the test bench; the detection component includes a base installed on the test bench, on which two parallel rollers are rotatably installed; a limit sleeve is also fixedly installed on the base; the detection component also includes a detection belt that cooperates with the limit sleeve and cannot be elastically deformed. The present invention positions the two ends of the ball valve shell through two detection belts, and at the same time, the two detection belts are tightly fitted with the ball valve shell, and the detection belts are always in a tensioned state. During the test, when the ball valve is quickly closed, if the water inlet end of the ball valve shell is deformed under the water hammer effect, the corresponding first indicator light will go out; if the water outlet end of the ball valve shell is deformed under the water hammer effect, the corresponding second indicator light will go out.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, in particular to a ball valve shell strength testing device. Background Art

[0002] Ball valves are used to regulate and control fluids. The ball in the ball valve is driven by the valve stem and rotates around the axis of the ball valve. The V-shaped ball core of the hard-sealed V-shaped ball valve and the metal shell of the hard alloy surfacing have a strong shear force, which is particularly suitable for media containing fibers and tiny solid particles. During operation, the ball valve shell is in direct contact with the high-speed flowing medium, and the interaction force between the ball valve shell and the medium is very strong. In order to ensure the strength of the ball valve shell and avoid deformation of the ball valve shell, it is necessary to sample and test the products on the ball valve shell production line during the production process.

[0003] There are some devices that can be used for ball valve shell strength test in the prior art, such as a coated sand clutch shell strength detection device disclosed in the Chinese invention patent application with publication number CN114383936A, which includes a base, a processing table is installed inside the base, and side plates are fixedly connected to the two sides of the base near the processing table, and a first drive mechanism is installed on the upper side of the base. The output end of the first drive mechanism is located on the upper side of the processing table and is installed with a rotating frame, and the lower surface of the rotating frame is installed with adjacent shell surface detection structures and lighting structures, and a tilting frame is installed inside the processing table, and a positioning piece is screwed on the upper surface of the tilting frame. Another example is an electrical housing strength detection device disclosed in the Chinese invention patent with publication number CN117848875A, which includes a base, a test base and a clamping mechanism. The device inserts the bottom of the electrical product shell into the right-angle clamping openings of two groups of clamping seats, and links the driving mechanism and the clamping mechanism, so that the rubber toothed belt of the driving mechanism can drive the right-angle clamping openings of the two groups of clamping seats to adjust the size and angle to clamp electrical product shells of different shapes, and the inclined placement direction of the two groups of clamping seats can be changed when the operating handle is turned.

[0004] When designing a ball valve, the closing speed of the ball valve needs to be controlled within a certain range. If the closing speed of the ball valve is too fast, a more obvious water hammer effect will occur, that is, the medium will cause a large impact force on the ball valve shell in a very short time, and this impact force is much greater than the force on the ball valve shell under normal circumstances. In actual use, the conveying system occasionally causes the ball valve to close quickly in an uncontrolled manner due to unavoidable reasons such as circuit failure or damage to mechanical parts. This requires the ball valve shell to have the ability to resist the water hammer effect. When the water hammer effect occurs, the force exerted by the medium on the ball valve shell is irregular, and existing devices cannot accurately detect whether the shell is deformed under the water hammer effect. Summary of the invention

[0005] The purpose of the present invention is to provide a ball valve shell strength testing device to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a ball valve housing strength test device, comprising a test bench, on which a support seat for supporting the ball valve housing is installed, and two detection components are also installed on the test bench; the detection component comprises a base installed on the test bench, on which two rollers parallel to each other are rotatably installed; a limit sleeve is also fixedly installed on the base; the detection component also includes a detection belt that cooperates with the limit sleeve and cannot undergo elastic deformation.

[0007] As a preferred technical solution of the present invention, positioning pieces with positioning grooves are fixedly installed at both ends of the detection belt, a translation seat is slidably installed in the horizontal direction on the base, and a positioning pin matching the positioning piece is slidably installed in the vertical direction on the translation seat; a spring seat is fixedly installed on the base, and a spring is connected between the spring seat and the translation seat.

[0008] As a preferred technical solution of the present invention, a first power supply box is slidably installed on the base in the horizontal direction, and a first indicator light and two first contacts are installed on the first power supply box; a first conductive bridge corresponding to the position of the first contact is fixedly installed on the translation seat.

[0009] As a preferred technical solution of the present invention, a second power box is slidably installed on the base, the sliding directions of the first power box and the second power box are parallel to each other, and the second power box is installed with a second indicator light and two second contacts; a second conductive bridge corresponding to the position of the second contact is fixedly installed on the outer wall of the first power box.

[0010] As a preferred technical solution of the present invention, two simulation components are provided on the test bench, and the simulation components include a pipe sleeve that slides with the test bench in a horizontal direction, and a water pipe is fixedly installed on the pipe sleeve. The two water pipes are in a coaxial state, and rubber rings coaxial with the water pipes are fixedly installed on the inner walls of the opposite ends of the two water pipes.

[0011] As a preferred technical solution of the present invention, a plurality of first pull wires are evenly and fixedly installed on the inner circumferential surface of the rubber ring in the circumferential direction, a mounting plate is provided in the water pipe, one end of each first pull wire is fixedly connected to the mounting plate, and the simulation component also includes a control unit for controlling the position of the mounting plate.

[0012] As a preferred technical solution of the present invention, the control unit includes a plurality of control rods installed inside the water pipe and slidingly cooperating with the water pipe along its radial direction. A second pull wire is fixedly wrapped around one end of the control rod, and one end of the second pull wire is fixedly connected to the mounting plate.

[0013] As a preferred technical solution of the present invention, a telescopic plate is installed on the end surface of the water pipe at a position corresponding to each control rod, the telescopic plate and the water pipe slide together along the axial direction of the water pipe, and an elastic part is connected between the telescopic plate and the water pipe; an oblique groove is opened on the telescopic plate, and a round pin that cooperates with the oblique groove is rotatably installed on the control rod.

[0014] As a preferred technical solution of the present invention, the mounting plate is square and has a square through groove; two sealing sheets are fixedly mounted on one side of the mounting plate, and the two sealing sheets have a first state of mutual adhesion and a second state of mutual separation.

[0015] In the above technical solution, the present invention provides a ball valve shell strength test device, which uses two detection belts to position the two ends of the ball valve shell. At the same time, the two detection belts are tightly fitted with the ball valve shell. The detection belts are always in a tensioned state. Once the ball valve shell collapses or expands, the detection belts will inevitably move. In this way, during the test, when the ball valve is quickly closed, if the water inlet end of the ball valve shell is deformed under the water hammer effect, the corresponding first indicator light will go out; if the water outlet end of the ball valve shell is deformed under the water hammer effect, the corresponding second indicator light will go out. The test personnel can determine whether the ball valve shell is deformed by observing the first indicator light and the second indicator light. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a first three-dimensional structural schematic diagram of the ball valve shell strength test device in Example 1;

[0018] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0019] Figure 3 It is a second three-dimensional structural schematic diagram of the ball valve shell strength test device in Example 1;

[0020] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0021] Figure 5 This is a partial structural schematic diagram of the detection component in Example 1;

[0022] Figure 6 It is a schematic diagram of a part of the structure of the simulation component in Example 2;

[0023] Figure 7 for Figure 6 The enlarged schematic diagram of the center C;

[0024] Figure 8 for Figure 6 Enlarged schematic diagram of point D in the middle.

[0025] Description of reference numerals:

[0026] 1. Test bench; 2. Support seat; 3. Detection component; 301. Base; 302. Roller; 303. Limit sleeve; 304. Detection belt; 305. Positioning piece; 306. Translation seat; 307. Positioning pin; 308. Spring seat; 309. Spring; 310. First power supply box; 311. First indicator light; 312. First contact; 313. First conductive bridge; 314. Second power supply box; 315. Second indicator light; 316. Second contact; 317. Second conductive bridge; 4. Simulation component; 401. Pipe sleeve; 402. Water pipe; 403. Rubber ring; 404. First pull wire; 405. Mounting plate; 406. Control rod; 407. Second pull wire; 408. Telescopic plate; 409. Elastic member; 410. Bevel groove; 411. Round pin; 412. Sealing piece. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0028] like Figure 1 As shown, the present embodiment provides a ball valve shell strength test device, including a test bench 1, on which a support seat 2 for supporting the ball valve shell is installed, the ball valve shell has two ends, one end of which is for water inlet and the other end of which is for water outlet during the test; the positions of the two ends of the ball valve need to be swapped for the test, that is, after the first test is completed, the ball valve needs to be turned as a whole, and the water inlet end of the first test is used as the water outlet end of the second test, and then the second test is performed; during the test, water is passed through the ball valve to maintain a normal flow rate, and then the operator quickly closes the ball valve, the water inlet end of the ball valve shell will be subjected to the radial impact force of the internal water flow under the water hammer effect, and it is necessary to detect whether the water inlet end of the ball valve shell expands, and the water outlet end of the ball valve shell will be subjected to the radial impact force of the external air under the water hammer effect (because a vacuum state suddenly occurs inside), and it is necessary to detect whether the water outlet end of the ball valve shell collapses.

[0029] like Figure 2 , Figure 4 and Figure 5As shown, two detection components 3 are also installed on the test bench 1, and the two detection components 3 correspond to the positions of the two ends of the ball valve housing respectively. The detection component 3 includes a base 301 installed on the test bench 1, and two parallel rollers 302 are rotatably installed on the base 301. The axes of the two rollers 302 are both in a horizontal state and the positions of the two rollers correspond to each other up and down; a limit sleeve 303 corresponding to the position between the two rollers 302 is also fixedly installed on the base 301, and the limit sleeve 303 is in a horizontal state; the detection component 3 also includes a detection belt 304 that cooperates with the limit sleeve 303 and cannot be elastically deformed; the space between the two rollers 302 The gap distance is equal to twice the thickness of the detection belt 304, and the height inside the limit sleeve 303 is also equal to twice the thickness of the detection belt 304; positioning plates 305 with positioning grooves are fixedly installed at both ends of the detection belt 304, and a translation seat 306 is slidably installed in the horizontal direction on the base 301. Specifically, the sliding direction of the translation seat 306 is perpendicular to the axis of the roller 302, and a positioning pin 307 that matches the positioning groove on the positioning plate 305 is slidably installed in the vertical direction on the translation seat 306; a spring seat 308 is fixedly installed on the base 301, and a spring 309 is connected between the spring seat 308 and the translation seat 306.

[0030] During the test, the operator first places the ball valve on the test bench 1, supports the ball valve housing through the support seat 2, and then adjusts the position of the detection belt 304, so that the detection belt 304 surrounds the ball valve housing and fits tightly with the outer surface of the ball valve housing (the detection belt 304 of one detection component 3 fits with the water inlet end of the ball valve housing, and the detection belt 304 of the other detection component 3 fits with the water outlet end of the ball valve housing); then, the two ends of the detection belt 304 are fitted together and passed through the gap between the two rollers 302, and then through the limit sleeve 303; the operator adjusts the detection belt 304 so that the two positioning pieces 30 5, and then pull the translation seat 306 until the positioning pin 307 is translated to the position corresponding to the positioning groove on the positioning piece 305, and finally manually move the positioning pin 307 downward so that the positioning pin 307 passes through the two positioning pieces 305. During this process, the spring 309 is stretched and generates a pulling force on the translation seat 306. The translation seat 306 and the positioning pin 307 have a tendency to move away from the ball valve housing. The positioning pin 307 has a tightening effect on the positioning piece 305 and the detection belt 304, so that the detection belt 304 remains in a state of close fit with the ball valve housing, and the detection belt 304 itself is always in a tensioned state. In this state, the detection belt 304 has a positioning effect on the ball valve housing, so that the ball valve housing is in a predetermined test position, which is convenient for other mechanisms to perform water supply and drainage operations on the ball valve. Once the water inlet end of the ball valve housing expands, it will inevitably generate an outward radial force on the corresponding detection belt 304. The positioning pieces 305 at both ends of the detection belt 304 will move toward the ball valve housing under the pulling force of the detection belt 304. The positioning pin 307 and the translation seat 306 will also move toward the ball valve housing at the same time. The spring 309 will be further stretched. Then, as long as the operator observes that the translation seat 306 moves toward the ball valve housing, it means that the water inlet end of the ball valve housing has expanded under the action of water hammer. Similarly, once the water outlet end of the ball valve housing collapses, A gap will be generated between the corresponding detection belt 304 and the ball valve housing, and the corresponding spring 309 will retract to a certain extent, pulling the translation seat 306 and the positioning pin 307 away from the ball valve housing. The positioning pieces 305 at both ends of the detection belt 304 will move away from the ball valve housing under the pulling force of the positioning pin 307, and the detection belt 304 will still remain in a tensioned state. Therefore, as long as the operator observes that the translation seat 306 moves away from the ball valve housing, it means that the water outlet end of the ball valve housing has collapsed under the action of water hammer.

[0031] In the actual test process, even if the ball valve housing is deformed under the action of water hammer, the deformation is very small, that is, even if the translation seat 306 is translated, it is difficult for the operator to ensure accurate observation simply by relying on the naked eye. Based on this, this embodiment also has the following design.

[0032] like Figure 4 and Figure 5As shown, a first power supply box 310 is slidably mounted on the base 301 in the horizontal direction, a first indicator light 311 and two first contacts 312 are mounted on the first power supply box 310, a power supply is arranged in the first power supply box 310, and the power supply is connected in series with the first indicator light 311 and the first contact 312 through a wire. Under normal circumstances, the circuit is in a disconnected state, and the first indicator light 311 is not lit; a first conductive bridge 313 corresponding to the position of the first contact 312 is fixedly mounted on the translation seat 306; a second power supply box 314 is slidably mounted on the base 301, and the first power supply box 314 is provided with a first power supply box 314, and the first power supply box 314 is provided with a first power supply box 314. The sliding directions of the box 310 and the second power box 314 are parallel to each other. The second power box 314 is equipped with a second indicator light 315 and two second contacts 316. A power supply is arranged in the second power box 314. The power supply is connected in series with the second indicator light 315 and the second contact 316 through a wire. Under normal circumstances, the circuit is in a disconnected state and the second indicator light 315 is not lit. A second conductive bridge 317 corresponding to the position of the second contact 316 is fixedly installed on the outer wall of the first power box 310. The first conductive bridge 313 and the second conductive bridge 317 are both made of conductive metal.

[0033] Specifically, during the test, after the operator adjusts the positions of the detection belt 304, the translation seat 306 and the positioning pin 307, he first pushes the first power supply box 310 so that the two first contacts 312 fit with the first conductive bridge 313. In this state, the first conductive bridge 313, the first contact 312 and the first indicator light 311 form a series path, and the first indicator light 311 is lit; then the operator pushes the second power supply box 314 so that the second contact 316 fits with the second conductive bridge 317. In this state, the second conductive bridge 317, the second contact 316 and the second indicator light 315 form a series path, and the second indicator light 315 is also lit; after the operator quickly closes the ball valve, if the translation seat 306 does not translate, the first indicator light 311 and the second indicator light 315 will remain normally lit, indicating that the ball valve shell has not been deformed. If the ball valve housing expands, the first conductive bridge 313 will translate together with the translation seat 306 toward the side close to the ball valve housing and separate from the first contact 312, the first indicator light 311 will go out, and the second indicator light 315 will remain on; if the ball valve housing collapses, the first conductive bridge 313 will translate together with the translation seat 306 toward the side away from the ball valve housing, the first conductive bridge 313 will push the first contact 312, the first indicator light 311, the first power supply box 310 and the second conductive bridge 317 to translate synchronously, the second conductive bridge 317 will separate from the second contact 316, the second indicator light 315 will go out, and the first indicator light 311 will remain on. In summary, in this embodiment, the operator only needs to observe the first indicator light 311 and the second indicator light 315 to accurately determine whether the ball valve housing is deformed.

[0034] like Figure 1 As shown, the test bench 1 is provided with two simulation components 4, which include a pipe sleeve 401 that slides with the test bench 1 in the horizontal direction, and the pipe sleeve 401 is electrically controlled. A water pipe 402 is fixedly installed on the pipe sleeve 401. The two water pipes 402 are coaxial, and a rubber ring 403 coaxial with the water pipe 402 is fixedly installed on the inner wall of the opposite end of the two water pipes 402, and the other ends of the two water pipes 402 are externally connected to a hose. During the test, when the position of the ball valve is determined, the two pipe sleeves 401 drive the water pipe 402 to move toward the ball valve under the action of external force until the end face of the water pipe 402 fits with the end face of the ball valve housing. In this state, the rubber ring 403 seals the annular contact surface between the water pipe 402 and the ball valve housing.

[0035] To sum up, in this embodiment, the detection belt 304 is tightly fitted to all parts of the ball valve while maintaining a tensioned state. As long as the ball valve is deformed under the action of water hammer, no matter where the deformation position is or how many deformation positions there are, the end of the detection belt 304 will produce corresponding movement, thereby accurately detecting the deformation of the ball valve shell. Example 2

[0036] In actual operation, if the outer diameter of the rubber ring 403 is exactly the same as the inner diameter of the ball valve housing, the water pipe 402 and the ball valve housing will have extremely high requirements for precision during docking, and it is difficult to ensure accurate docking. If the outer diameter of the rubber ring 403 is smaller than the inner diameter of the ball valve housing, the sealing cannot be guaranteed. Based on this, this embodiment is designed as follows.

[0037] like Figure 6 and Figure 7As shown, on the basis of the previous embodiment, the rubber ring 403 corresponding to the water pipe 402 responsible for delivering water in this embodiment is a conical structure when there is no external force, that is, the outer diameter of one end of the rubber ring 403 is 2 mm larger than the outer diameter of the other end, and the internal diameter of the rubber ring 403 is the same everywhere. Specifically, the end of the rubber ring 403 facing the water pipe 402 is the small end, and the end of the rubber ring 403 facing the ball valve housing is the large end; a plurality of first pull wires 404 are evenly fixedly installed along the circumferential direction on the inner circumferential surface of the large end of the rubber ring 403, a mounting plate 405 is provided in the water pipe 402, and one end of each first pull wire 404 is fixedly connected to the mounting plate 405 together, and the simulation component 4 also includes a device for mounting A control unit for controlling the position of the plate 405; the control unit includes a plurality of control rods 406 installed inside the water pipe 402 and slidingly cooperating with the water pipe 402 along its radial direction, one end of the control rod 406 is fixedly wrapped with a second pull wire 407, and one end of the second pull wire 407 is fixedly connected to the mounting plate 405; a telescopic plate 408 is installed on the end surface of the water pipe 402 at a position corresponding to each control rod 406, the telescopic plate 408 and the water pipe 402 are slidingly cooperating along the axial direction of the water pipe 402, and an elastic member 409 is connected between the telescopic plate 408 and the water pipe 402; an oblique groove 410 is opened on the telescopic plate 408, and a round pin 411 cooperating with the oblique groove 410 is rotatably installed on the control rod 406.

[0038] Specifically, before the water pipe 402 is connected to the ball valve housing, the rubber ring 403 is Figure 6 In the state shown, the large end of the rubber ring 403 is in a state of contraction toward the center under the pulling force of the first pull wire 404; the large end of the rubber ring 403 has a tendency to spread outward and restore to its original state, and the supporting effect of the elastic member 409 keeps the telescopic plate 408 and the control rod 406 in the state shown in FIG. Figure 6State, the second pull wire 407 and the first pull wire 404 remain in a tensioned state, and the second pull wire 407 and the first pull wire 404 are both in an inclined state, the second pull wire 407 has a leftward pulling force on the mounting plate 405, and the first pull wire 404 has a rightward pulling force on the mounting plate 405, the mounting plate 405 maintains a balanced state, and the large end of the rubber ring 403 also remains in a state of contraction toward the center; in this state, the actual outer diameter of the large end of the rubber ring 403 is smaller than the inner diameter of the ball valve shell, so when the water pipe 402 is connected to the ball valve shell, the large end of the rubber ring 403 can easily enter the ball valve shell, and as the water pipe 402 gets closer to the end face of the ball valve shell, the telescopic plate 408 will contact with the ball valve shell. The end face of the water pipe 402 contacts and overcomes the support of the elastic member 409 under the force of the end face of the ball valve housing to generate translation relative to the water pipe 402. The elastic member 409 is deformed. When the telescopic plate 408 translates, an interaction force is generated between the inclined groove 410 and the round pin 411. The round pin 411 and the control rod 406 move toward the center of the water pipe 402. The second pull wire 407 tends to be horizontal. The mounting plate 405 is able to translate to the right under the tension of the first pull wire 404. The first pull wire 404 tends to relax, and the large end of the rubber ring 403 is able to spread outward. During the process of spreading outward, the large end of the rubber ring 403 is tightly fitted with the inner wall of the ball valve housing, thereby ensuring the sealing between the water pipe 402 and the ball valve housing.

[0039] like Figure 8 As shown, the mounting plate 405 is square, and a square through slot is provided on the mounting plate 405; two sealing sheets 412 are fixedly installed on one side of the mounting plate 405, and the sealing sheets 412 include a vertical portion and a curved portion, and the curved portions of the two sealing sheets 412 fit each other; the two sealing sheets 412 have a first state of fitting each other, and a second state of separation from each other, and when there is no external force, the two sealing sheets 412 maintain the first state, and the sealing sheets 412 in the second state will automatically return to the first state after the external force disappears. Figure 6To explain, under normal water supply state, water flows from left to right on the mounting plate 405 and the sealing plate 412, the two sealing plates 412 maintain the first state, the mounting plate 405 and the sealing plate 412 as a whole are subjected to the rightward force and tend to move to the right, the first pull line 404 further tends to relax, and the large end of the rubber ring 403 is able to fit more closely with the inner wall of the ball valve housing, thereby improving the sealing performance; when the operator quickly closes the ball valve, the water in the ball valve housing will rebound, and the refluxed water acts on the mounting plate 405 and the sealing plate 412, the sealing plate 412 opens under the action of the water flow, allowing the water flow to pass through the mounting plate 405, and the two sealing plates 412 enter the second state until the water flow disappears, and the sealing plate 412 recovers to the first state under its own resilience. In this way, the force on the mounting plate 405 under the action of the backflow water is greatly reduced, and the distance that the mounting plate 405 moves to the left under the action of the backflow water when the water hammer effect occurs is significantly reduced, thereby avoiding the situation where the sealing performance is reduced due to the large end of the rubber ring 403 shrinking too much toward the center.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A ball valve housing strength test device, comprising a test bench (1), on which a support seat (2) for supporting the ball valve housing is mounted, characterized in that: Two detection components (3) are also installed on the test bench (1); the detection component (3) comprises a base (301) installed on the test bench (1), and two rollers (302) are rotatably installed on the base (301) and are parallel to each other; a limit sleeve (303) is also fixedly installed on the base (301); the detection component (3) also comprises a detection belt (304) that cooperates with the limit sleeve (303) and cannot undergo elastic deformation; The test bench (1) is provided with two simulation components (4), the simulation component (4) comprising a pipe sleeve (401) that is slidably matched with the test bench (1) in a horizontal direction, a water pipe (402) being fixedly mounted on the pipe sleeve (401), the two water pipes (402) being in a coaxial state, and a rubber ring (403) coaxial with the water pipe (402) being fixedly mounted on the inner wall of opposite ends of the two water pipes (402); A plurality of first pull wires (404) are evenly and fixedly installed on the inner circumferential surface of the rubber ring (403) in the circumferential direction; a mounting plate (405) is provided in the water pipe (402); one end of each first pull wire (404) is fixedly connected to the mounting plate (405); the simulation component (4) further comprises a control unit for controlling the position of the mounting plate (405); the control unit comprises a plurality of control rods (406) installed inside the water pipe (402) and slidingly cooperating with the water pipe (402) in the radial direction thereof; one end of the control rod (406) is fixedly wound with a second pull wire (407); one end of the second pull wire (407) is fixedly connected to the mounting plate (405); A telescopic plate (408) is installed at a position corresponding to each control rod (406) on the end surface of the water pipe (402), the telescopic plate (408) and the water pipe (402) are slidably matched along the axial direction of the water pipe (402), and an elastic member (409) is connected between the telescopic plate (408) and the water pipe (402); an inclined groove (410) is provided on the telescopic plate (408), and a round pin (411) matched with the inclined groove (410) is rotatably installed on the control rod (406); the mounting plate (405) is square, and a square through groove is provided on the mounting plate (405); two sealing sheets (412) are fixedly installed on one side of the mounting plate (405), and the two sealing sheets (412) have a first state of being mutually fitted, and a second state of being separated from each other.

2. A ball valve shell strength test device according to claim 1, characterized in that: Both ends of the detection belt (304) are fixedly mounted with positioning pieces (305) with positioning grooves, a translation seat (306) is slidably mounted on the base (301) in the horizontal direction, and a positioning pin (307) matching the positioning piece (305) is slidably mounted on the translation seat (306) in the vertical direction; a spring seat (308) is fixedly mounted on the base (301), and a spring (309) is connected between the spring seat (308) and the translation seat (306).

3. A ball valve shell strength test device according to claim 2, characterized in that: A first power supply box (310) is slidably mounted on the base (301) in a horizontal direction, and a first indicator light (311) and two first contacts (312) are mounted on the first power supply box (310); a first conductive bridge (313) corresponding to the position of the first contacts (312) is fixedly mounted on the translation seat (306).

4. A ball valve shell strength test device according to claim 3, characterized in that: A second power supply box (314) is slidably mounted on the base (301); the sliding directions of the first power supply box (310) and the second power supply box (314) are parallel to each other; a second indicator light (315) and two second contacts (316) are mounted on the second power supply box (314); and a second conductive bridge (317) corresponding to the position of the second contacts (316) is fixedly mounted on the outer wall of the first power supply box (310).

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