Valve steel casting strength detection equipment

Abstract

The invention provides valve steel casting strength detection equipment, and relates to the technical field of valve strength detection.The valve steel casting strength detection equipment comprises a transverse sliding rod, a U-shaped vertical supporting frame is welded to the top end of the transverse sliding rod, and a transverse force distribution plate is fixedly arranged below the transverse sliding rod; two L-shaped mounting plates are symmetrically and fixedly connected to the top ends of the square driving block and the vertical force transmission plate, U-shaped mounting frames are fixedly connected to the L-shaped mounting plates, and I-shaped driving parts are slidably mounted on the two U-shaped mounting frames; and two longitudinal limiting shafts are symmetrically and fixedly connected to the bottom end part of the transverse sliding rod, transverse sliding plates are slidably installed on the two longitudinal limiting shafts in a spring pushing mode, positioning insertion shafts are fixedly connected to the inner sides of the transverse sliding plates, and the I-shaped driving part is in penetrating sliding fit with the U-shaped transmission frame. According to the device, the switching and adjusting operation of the use states of the vertical supporting and jacking plate and the jacking swing plate can be driven and executed through one-time sliding of the vertical force transmission plate, the operation steps are simplified, and the operation and use efficiency of the detection equipment can be indirectly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve strength detection, in particular to a valve steel casting strength detection device. Background Art

[0002] As the core component of the valve, the strength of valve steel castings is an important indicator to ensure the normal operation of the valve under complex working conditions such as high pressure, high temperature, and corrosion. The strength test of valve steel castings includes bending strength test. Since most valve steel castings have irregular special-shaped structures, it is inconvenient to perform direct top pressure bending resistance test. Therefore, most of them adopt the method of top pressure test on the raw material plates to indirectly realize their bending strength test.

[0003] In order to simultaneously have the functions of four-point and three-point bending strength testing, the existing strength testing equipment is equipped with two top pressure test plates for four-point bending strength testing and one top pressure test plate for three-point bending strength testing. When in use, the use status of the top pressure test plate and the two top pressure test plates need to be switched (such as switching the top pressure test plate to the use status and switching the two top pressure test plates to the idle status). However, the switching operations of the use status of the top pressure test plate and the two top pressure test plates mostly need to be performed step by step, which is relatively troublesome and inefficient. Summary of the Invention

[0004] In view of this, the present invention provides a valve casting strength testing device to solve the problem that the switching operation of the use status of the top pressure detection plate and the two top pressure test plates needs to be performed step by step, which is relatively troublesome and inefficient.

[0005] The technical solution proposed by the present invention is: a valve casting strength testing device, specifically including a horizontal slide rod, a U-shaped vertical support frame is welded on the top of the horizontal slide rod, and a horizontal force distribution plate is fixedly arranged under the horizontal slide rod; a vertical force transmission plate is slidingly passed through the U-shaped vertical support frame and the horizontal slide rod, the bottom end of the vertical force transmission plate is fixedly connected to a square driving block, the bottom end of the square driving block is fixedly connected to a vertical support top pressure plate, and the vertical support top pressure plate and the horizontal force distribution plate are slidingly matched; the two ends of the horizontal force distribution plate are symmetrically connected to two top pressure swing plates for rotation, and the two ends of the top pressure swing plate rotating shaft are symmetrically fixed to two An L-shaped transmission member, a connecting rod is rotatably connected between the head end of the L-shaped transmission member and the square drive block; two L-shaped mounting plates are symmetrically fixed to the top of the square drive block and the vertical force transmission plate, a U-shaped mounting frame is fixed to the L-shaped mounting plate, and an I-shaped driving member is slidably installed on the two U-shaped mounting frames; the bottom end part of the horizontal slide bar is symmetrically fixed to two longitudinal limit shafts, and a transverse slide is slidably installed on the two longitudinal limit shafts in the form of spring push, a positioning plug shaft is fixed to the inner side of the transverse slide, and a U-shaped transmission frame is fixed to the outer side, and the I-shaped driving member and the U-shaped transmission frame are slidably fitted through.

[0006] Furthermore, the vertical force transmission plate is provided with two positioning holes spaced apart from each other, and the positioning plug shaft is selectively plugged into and engaged with the two positioning holes; The top of the horizontal sliding rod is located between the two vertical support side plates of the U-shaped vertical support frame and is welded with a square rod sleeve. The vertical force transmission plate and the square rod sleeve are in sliding fit. The positioning plug shaft and the two horizontal side walls of the square rod sleeve are in sliding fit.

[0007] Furthermore, the spring for pushing the transverse slide is mounted on the longitudinal limit shaft and is compressed and clamped between the transverse slide and the U-shaped vertical support frame. The tail end of the longitudinal limit shaft is fixedly connected with a baffle, and the transverse slide is in contact with the baffle.

[0008] Furthermore, two vertical support force transmission plates are symmetrically welded at the middle position of the bottom of the horizontal slide rod, and horizontal force distribution plates are welded at the bottom ends of the two vertical support force transmission plates. The square drive block is located between the two vertical support force transmission plates and slides in contact with the inner sides of the two vertical support force transmission plates.

[0009] Furthermore, a T-shaped handle plate is welded to the middle portion of the I-shaped driving member, and the vertical support plate of the I-shaped driving member is in contact with the inner side of the horizontal side plate of the U-shaped transmission frame.

[0010] Furthermore, it also includes a "Y"-shaped base, a "Y"-shaped vertical frame is welded to the top of the "Y"-shaped base, and a horizontal slide rod is slidably installed on two vertical support rods of the "Y"-shaped vertical frame; Two top-pressure oil cylinders are symmetrically mounted on the bottom of the top side rods of the U-shaped vertical frame, and the head ends of the piston rods of the two top-pressure oil cylinders are fixedly connected with the horizontal sliding rod.

[0011] Furthermore, an electric control box is fixedly mounted on a vertical support rod of the U-shaped vertical frame, and a control unit for controlling the extension and contraction of the top pressure cylinder and monitoring and setting the ejection pressure of the top pressure cylinder is provided inside the electric control box.

[0012] Furthermore, two rows of threaded fixing holes are symmetrically opened on the inner longitudinal connecting plate of the said "Y"-shaped base, and two T-shaped load-bearing plates are symmetrically installed on the top of the longitudinal connecting plate. The T-shaped load-bearing plates are locked and fixed with the two rows of threaded fixing holes by bolts in an optional manner; The cast steel plates to be tested are placed on the top of the two T-shaped load-bearing plates. When the two top pressure swing plates are positioned in the vertical support state, they are used to follow the horizontal slide bar to slide down and press into contact with the cast steel plates, and implement four-point bending strength testing on the cast steel plates. When the vertical support top pressure plate slides down and extends, it is used to follow the horizontal slide bar to slide down and press into contact with the middle part of the cast steel plates, and implement three-point bending strength testing on the cast steel plates.

[0013] The valve casting strength testing device provided by the present invention has the following beneficial effects: 1. The present invention can implement three-point bending strength testing and four-point bending strength testing on cast steel plates. These two testing functions can achieve complementary advantages. The three-point bending test can highlight the strength characteristics of the cast steel under concentrated stress, and the four-point bending test can reflect its performance under uniform stress. The combination of the two can more comprehensively evaluate the bending strength of valve cast steel parts, avoiding the limitations that may exist in a single testing method.

[0014] 2. When the vertical force transmission plate drives the square drive block to slide up and down to switch and adjust the use status of the two top pressure swing plates, it can also drive the vertical support top pressure plate to slide synchronously, and jointly perform the lifting and lowering switching adjustment operation of the use status of the vertical support top pressure plate. In this way, the switching and adjustment operation of the use status of the vertical support top pressure plate and the top pressure swing plate can be executed through a one-time sliding drive of the vertical force transmission plate. The operation steps are streamlined, and the trouble of switching the use status of the vertical support top pressure plate and the top pressure swing plate in steps can be eliminated, which helps to indirectly improve the operation efficiency of the detection equipment.

[0015] 3. The present invention sets a transmission mechanism and a driving mechanism, so that in the process of switching and adjusting the use status of the vertical support top pressure plate and the top pressure swing plate, the hand does not need to move additionally, and only needs to continue to hold the T-shaped handle plate. The driving mechanism can drive the switching and adjustment operations of the use status of the vertical support top pressure plate and the top pressure swing plate and the unlocking and locking operations of the vertical support top pressure plate and the top pressure swing plate in sequence at one time. This makes it possible to execute the three operations at one time with one hand, eliminating the trouble of requiring both hands to coordinate and execute the three operations step by step, eliminating the occupation of both hands, and is simple and convenient to operate.

[0016] 4. When the vertical force transmission plate is driven to slide upward and downward by the driving mechanism, the I-shaped driving member is also driven to slide synchronously, and the vertical support plate of the I-shaped driving member and the U-shaped transmission frame are arranged to slide through the setting, which can be used for the above sliding of the I-shaped driving member, ensuring that the driving mechanism can still continuously contact and transmit with the transmission mechanism when being driven up and down, so that no matter what position the driving mechanism is driven to, it can implement normal and effective insertion and extraction drive on the positioning plug shaft through the transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0018] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0019] In the attached figure: Figure 1 Shows a schematic diagram of the overall structure of the present invention; Figure 2A schematic diagram showing the installation positions of the U-shaped vertical support frame and the horizontal cloth plate in the present invention is shown; Figure 3 A schematic diagram showing the installation positions of the vertical force transmission plate and the I-shaped drive member in the present invention is shown; Figure 4 A schematic diagram showing a side view of the back of a square rod sleeve and a square driving block in the present invention is shown; Figure 5 The figure shows the assembly relationship between the top pressure swing plate, the vertical support top pressure plate and the horizontal force distribution plate in the present invention; Figure 6 A schematic diagram showing the disassembled state of the vertical force transmission plate and the I-shaped driving member in the present invention is shown; Figure 7 A schematic diagram showing a bottom side view of a transverse sliding rod and a transverse force plate in the present invention is shown; Figure 8 The figure shows the transmission relationship between the top pressure swing plate and the square drive block in the present invention; Figure 9 The figure shows a schematic structural diagram of the I-shaped driving member in the present invention.

[0020] List of reference numerals: 1. Chinese character "Y" shaped base; 101. U-shaped vertical frame; 102. Threaded fixing hole; 2. T-shaped bearing plate; 3. Cast steel plates; 4. Top pressure cylinder; 5. Horizontal slide bar; 501. U-shaped vertical support frame; 5011. Vertical limit shaft; 5012. Stop plate; 502. Vertical support force transmission plate; 503. Horizontal force distribution plate; 504. Top pressure swing plate; 5041. L-shaped transmission member; 505. Square rod sleeve; 6. Vertical force transmission plate; 601. Square drive block; 602. Vertical support top pressure plate; 603. L-shaped mounting plate; 604. U-shaped mounting frame; 605. I-shaped drive member; 6051. T-shaped handle plate; 606. Connecting rod; 7. Horizontal slide; 701. U-shaped transmission frame; 702. Positioning plug shaft; 8. Electric control box. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The following is an embodiment of the present invention, please refer to Figures 1 to 9 : The present embodiment proposes a valve casting strength testing device, comprising a transverse slide 5, a U-shaped vertical support frame 501 welded to the middle position of the top of the transverse slide 5, and a transverse force plate 503 fixedly arranged below the transverse slide 5; a vertical force transmission plate 6 is slid through the U-shaped vertical support frame 501 and the middle position of the transverse slide 5, the bottom end of the vertical force transmission plate 6 is fixedly connected to a square driving block 601, the bottom end of the square driving block 601 is fixedly connected to a vertical support top pressure plate 602, the vertical support top pressure plate 602 is slidably matched with the middle position of the transverse force plate 503; the two ends of the transverse force plate 503 are symmetrically connected to two top pressure swing plates 504, the two ends of the rotating shaft of the top pressure swing plate 504 are symmetrically fixed to two L-shaped transmission parts 5041, and the L-shaped transmission parts are symmetrically connected to the rotating shaft of the L-shaped transmission parts 5041. A connecting rod 606 is rotatably connected between the head end of the moving part 5041 and the square driving block 601; two L-shaped mounting plates 603 are symmetrically fixedly connected to the top of the square driving block 601 and the vertical force transmission plate 6, and a U-shaped mounting frame 604 is fixedly connected to the L-shaped mounting plate 603, and an I-shaped driving part 605 is slidably installed on the two U-shaped mounting frames 604; the bottom end part of the horizontal slide bar 5 is symmetrically fixedly connected to two longitudinal limit shafts 5011, and a transverse slide 7 is slidably installed on the two longitudinal limit shafts 5011 in the form of spring push, a positioning plug shaft 702 is fixedly connected to the inner middle position of the transverse slide 7, and a U-shaped transmission frame 701 is fixedly connected to the outer middle position, and the vertical support plate of the I-shaped driving part 605 is slidably fitted with the U-shaped transmission frame 701.

[0023] Preferably, two positioning holes are provided on the vertical force transmission plate 6 at intervals, and the positioning plug shaft 702 is selectively plugged into and engaged with the two positioning holes; the top end of the horizontal slide rod 5 is located between the two vertical support side plates of the U-shaped vertical support frame 501 and is welded with a square rod sleeve 505, and the vertical force transmission plate 6 and the square rod sleeve 505 are slidably engaged, and the positioning plug shaft 702 and the two horizontal side walls of the square rod sleeve 505 are slidably engaged.

[0024] Preferably, the spring for pushing the horizontal slide 7 is mounted on the longitudinal limit shaft 5011 and is compressed and clamped between the horizontal slide 7 and the U-shaped vertical support frame 501. The tail end of the longitudinal limit shaft 5011 is fixedly connected to a baffle 5012, and the horizontal slide 7 is in contact with the baffle 5012.

[0025] Preferably, two vertical support force transmission plates 502 are symmetrically welded at the middle position of the bottom of the horizontal slide rod 5, and horizontal force distribution plates 503 are welded at the bottom ends of the two vertical support force transmission plates 502. The square drive block 601 is located between the two vertical support force transmission plates 502 and slides in contact with the inner sides of the two vertical support force transmission plates 502.

[0026] Preferably, a T-shaped handle plate 6051 is welded to the middle portion of the I-shaped driving member 605 , and the vertical support plate of the I-shaped driving member 605 abuts against the inner side of the horizontal side plate of the U-shaped transmission frame 701 .

[0027] Preferably, it also includes a U-shaped base 1, a U-shaped vertical frame 101 is welded to the top of the U-shaped base 1, and a horizontal slide rod 5 is slidably installed on the two vertical support rods of the U-shaped vertical frame 101; two top pressure cylinders 4 are symmetrically hoisted at the bottom of the top side rod of the U-shaped vertical frame 101, and the head ends of the piston rods of the two top pressure cylinders 4 are fixedly connected to the horizontal slide rod 5.

[0028] Preferably, an electric control box 8 is fixedly mounted on a vertical support rod of the U-shaped vertical frame 101, and a control unit for controlling the extension and contraction of the top pressure cylinder 4 and monitoring and setting the ejection pressure of the top pressure cylinder 4 is provided inside the electric control box 8.

[0029] Preferably, two rows of threaded fixing holes 102 are symmetrically opened on the internal longitudinal connecting plate of the Chinese-Signal base 1, and two T-shaped load-bearing plates 2 are symmetrically installed on the top of the longitudinal connecting plate, and the T-shaped load-bearing plates 2 are locked and fixed with the two rows of threaded fixing holes 102 in an optional manner by bolts; the cast steel plates 3 to be tested are placed on the top of the two T-shaped load-bearing plates 2, and when the two top pressure swing plates 504 are positioned in the upright support state, they are used to follow the horizontal slide bar 5 to slide down and press into contact with the cast steel plate 3, and perform a four-point bending strength test on the cast steel plate 3. When the vertical support top pressure plate 602 slides down and extends, it is used to follow the horizontal slide bar 5 to slide down and press into contact with the middle part of the cast steel plate 3, and perform a three-point bending strength test on the cast steel plate 3.

[0030] The following is a detailed explanation of the working principle, specific details, implementation steps, functions and interrelationships of the various features of the above embodiment, and the role played by these features in implementing the technical solution: The cast steel plate 3 is the raw material for manufacturing valve cast steel parts. The present invention can implement three-point bending strength testing and four-point bending strength testing on the cast steel plate 3. The two detection functions can achieve complementary advantages. The three-point bending test can highlight the strength characteristics of the cast steel parts under concentrated force, and the four-point bending test can reflect its performance under uniform force. The combination of the two can more comprehensively evaluate the bending strength of the valve cast steel parts and avoid the limitations that may exist in a single detection method.

[0031] When in use, first set the top pressure detection force output by the top pressure cylinder 4 through the control unit, then place the cast steel plate 3 to be tested on the top of the T-shaped bearing plate 2, then swing the two top pressure swing plates 504 to the upright support state, and at the same time slide the vertical support top pressure plate 602 up to the retracted idle state (refer to Figure 1), and position the top pressure swing plate 504 and the vertical support top pressure plate 602 and keep them in the above state, then control the piston rod of the top pressure cylinder 4 to slide down, and push the horizontal slide bar 5 and the two top pressure swing plates 504 downward through the piston rod, control the two top pressure swing plates 504 to press on the cast steel plate 3 to implement four-point bending strength test, when the two top pressure swing plates 504 are in top pressure contact with the cast steel plate 3, under the continuous action of the top pressure test force set on the top pressure cylinder 4, the piston rod of the top pressure cylinder 4 is driven to slide down and extend continuously, and drive the two top pressure swing plates 504 to bend the cast steel plate 3, when the top When the actual top pressure detection force output by the pressure cylinder 4 reaches the set top pressure detection force, it stops outputting the top pressure and its piston rod stops extending, interrupting the continuous top pressure between the two top pressure swing plates 504 and the cast steel plate 3. At this time, the distance between the lowest point of the compressed bending part of the cast steel plate 3 and the top of the T-shaped bearing plate 2 is measured. If the distance is less than the standard reference length value, it is determined that the four-point bending strength test of the cast steel plate 3 is qualified, otherwise it is unqualified. Finally, the piston rod of the top pressure cylinder 4 is controlled to retract and reset, and the retracted piston rod drives the horizontal slide bar 5 and the two top pressure swing plates 504 to rise and return to their original positions; After the four-point bending strength test is completed, the three-point bending strength test is started. First, replace the new cast steel plate 3, and reset the output top pressure test force of the top pressure cylinder 4 for the three-point bending strength test through the control unit. Then, the two top pressure swing plates 504 are swung to the horizontal idle state, and the vertical support top pressure plate 602 is slid down to the extended use state, and the top pressure swing plate 504 and the vertical support top pressure plate 602 are positioned and maintained in the above state. Then, the piston rod of the top pressure cylinder 4 is controlled to slide down and extend, and the vertical support top pressure plate 602 is pressed against the cast steel plate 3. A three-point bending strength test is performed, and then the distance between the lowest point of the compressed bending part of the cast steel plate 3 and the top of the T-shaped bearing plate 2 is measured. If the distance is less than the standard reference length value (this value is suitable for reference in judging the three-point bending strength test), the three-point bending strength test of the cast steel plate 3 is judged to be qualified, otherwise it is unqualified. Finally, the piston rod of the top pressure cylinder 4 is controlled to retract and reset, and the horizontal slide rod 5 and the vertical support top pressure plate 602 are driven to rise and return to their positions through the retracted piston rod. At this point, the entire process of the three- and four-point bending strength test of the cast steel plate 3 is completed.

[0032] It is worth noting that: the top pressure cylinder 4 is connected to the external hydraulic power unit through a high-pressure oil pipe, and a solenoid valve is provided on the high-pressure oil pipe. The solenoid valve is electrically connected to the control unit. The control unit switches the oil circuit by controlling the power on and off of the solenoid valve coil to realize the extension and retraction control of the top pressure cylinder 4; the composition of the control unit, its connection and wiring method with the solenoid valve, and the selection of the solenoid valve model are existing technologies for technicians in this field engaged in equipment electrification transformation, design and testing, so they will not be elaborated here.

[0033] The square drive block 601, four connecting rods 606, and two top pressure swing plates 504 together form a set of four crank slider mechanisms. Through this mechanism, the square drive block 601 can be slid up and down to drive the two top pressure swing plates 504 to swing up and down to adjust and switch their use status. The square drive block 601 can be driven to slide up and down by the vertical force transmission plate 6. Since the vertical support top pressure plate 602 is fixedly connected to the square drive block 601, the vertical force transmission plate 6 can simultaneously drive the vertical support top pressure plate 602 to slide synchronously when driving the square drive block 601 to slide up and down to switch and adjust the use status of the two top pressure swing plates 504, thereby performing the lifting and lowering switching adjustment of the use status of the vertical support top pressure plate 602. The operation (note: the use states of the vertical support top pressure plate 602 and the top pressure swing plate 504 are reversed, that is, when the top pressure swing plate 504 is in the swinging upright use state, the vertical support top pressure plate 602 is placed in the idle state of sliding up and retracting, and when the top pressure swing plate 504 is in the swinging horizontal idle state, the vertical support top pressure plate 602 is placed in the use state of sliding down and extending). In this way, the switching and adjustment operation of the use states of the vertical support top pressure plate 602 and the top pressure swing plate 504 can be executed by a one-time sliding drive of the vertical force transmission plate 6. The operation steps are simplified, and the trouble of switching the use states of the vertical support top pressure plate 602 and the top pressure swing plate 504 in sequence can be eliminated, which helps to indirectly improve the operation efficiency of the detection equipment.

[0034] When the positioning plug-in shaft 702 is respectively plugged into and matched with the two positioning holes on the vertical force transmission plate 6, the vertical force transmission plate 6 can be plugged and fixed, and the vertical support pressure plate 602 and the pressure swing plate 504 are respectively positioned and maintained in the use state or the idle state. The pushing force of the spring on the longitudinal limit shaft 5011 is transmitted to the positioning plug-in shaft 702 through the transverse slide plate 7. The spring is used to push the positioning plug-in shaft 702 and maintain it in the plug-in and positioning use state.

[0035] When driving the vertical force transmission plate 6 to slide up and down and switching and adjusting the use status of the vertical support top pressure plate 602 and the top pressure swing plate 504, the positioning plug shaft 702 needs to be inserted and matched with the positioning hole. When the positioning plug shaft 702 is pulled out of the positioning hole, the vertical force transmission plate 6 can be unlocked and loosened, which is convenient for sliding and driving the vertical force transmission plate 6. The horizontal slide plate 7 can be controlled to insert and match with the positioning hole by sliding the horizontal slide plate 7 back and forth along the two longitudinal limit shafts 5011. Through the power transmission of the U-shaped transmission frame 701, when the I-shaped driving member 605 is driven to slide away from the horizontal slide bar 5, the horizontal slide plate 7 and the positioning hole can be pushed and driven. The positioning plug shaft 702 slides synchronously, controlling the positioning plug shaft 702 to be pulled out from the positioning hole, and the sliding operation of the I-shaped drive member 605 away from the horizontal slide bar 5 can be performed manually through the T-shaped handle plate 6051. Since the I-shaped drive member 605 is connected to the vertical force transmission plate 6 through two L-shaped mounting plates 603 and the U-shaped mounting frame 604, the hand can be held on the T-shaped handle plate 6051 to drive the positioning plug shaft 702 to slide and pull out through the I-shaped drive member 605, and when the vertical force transmission plate 6 is unlocked and released, the I-shaped drive member 605 and the vertical force transmission plate 6 can be directly driven to slide up and down without additional movement. The vertical support top pressure plate 602 and the top pressure swing plate 504 are conveniently and quickly switched and adjusted in use. When the vertical force transmission plate 6 is slidably driven into place and the switching adjustment of the use states of the vertical support top pressure plate 602 and the top pressure swing plate 504 is completed, the I-shaped driving member 605 is slid toward the horizontal slide bar 5. When the I-shaped driving member 605 is slidably driven in this way, the compression holding force of the spring on the longitudinal limit shaft 5011 is released indirectly through the U-shaped transmission frame 701 and the horizontal slide plate 7 (the vertical force transmission plate 6 drives the horizontal slide plate 7 to slide away from the horizontal slide bar 5, controlling the sliding of the positioning plug shaft 702 and the positioning hole). When the lever 702 is pulled out, the spring on the longitudinal limit shaft 5011 is compressed). At this time, the spring can reversely drive the transverse slide 7 and the positioning plug shaft 702 to slide back toward the transverse slide bar 5, and control the positioning plug shaft 702 to engage with the positioning holes at the corresponding positions on the vertical force transmission plate 6 after the adjustment is driven (when the vertical force transmission plate 6 is slid into place and the switching adjustment of the use status of the vertical support top pressure plate 602 and the top pressure swing plate 504 is completed, the positioning plug shaft 702 is aligned with the positioning holes at the corresponding positions on the vertical force transmission plate 6 after being driven into place), and the vertical support top pressure plate 602 and the top pressure swing plate 504 after the switching adjustment are performed.

[0036] The T-shaped handle plate 6051 and the I-shaped drive member 605 together constitute a driving mechanism, which is connected to the vertical force transmission plate 6 through two L-shaped mounting plates 603 and a U-shaped mounting frame 604, and can be used to drive the vertical force transmission plate 6 to slide up and down, thereby realizing the switching and adjustment of the use status of the vertical support top pressure plate 602 and the top pressure swing plate 504. The driving mechanism can also automatically slide relative to the vertical force transmission plate 6 through the two U-shaped mounting frames 604, driving the driving positioning plug shaft 702 to engage with the positioning hole for insertion and extraction, thereby realizing locking and unlocking the vertical support top pressure plate 602 and the top pressure swing plate 504. The driving mechanism thus has a dual-purpose use effect, which can eliminate the need to additionally configure a pulling and extracting drive component for the positioning plug shaft 702, and helps to simplify the structure of the detection equipment to a certain extent.

[0037] The horizontal slide 7 and the U-shaped transmission frame 701 together constitute a transmission mechanism for transmitting power between the positioning plug shaft 702 and the I-shaped drive member 605. Through the transmission mechanism, the driving mechanism can realize the pulling and inserting drive of the positioning plug shaft 702. By setting the transmission mechanism and the driving mechanism, the present invention can switch and adjust the use status of the vertical support top pressure plate 602 and the top pressure swing plate 504 by setting the transmission mechanism and the driving mechanism. Without the need for additional movement, the hand only needs to continue to hold the T-shaped handle 6051. The driving mechanism can drive the switching and adjustment operations of the use status of the vertical support top pressure plate 602 and the top pressure swing plate 504 and the unlocking and locking operations of the vertical support top pressure plate 602 and the top pressure swing plate 504 in sequence at one time. This makes it possible to perform the three operations with a one-time drive of one hand, eliminating the trouble of requiring both hands to coordinate and perform the three operations step by step, eliminating the occupation of both hands, and is simple and convenient to operate.

[0038] When the vertical force transmission plate 6 is driven to slide up and down by the driving mechanism, the I-shaped driving member 605 is also driven to slide synchronously, and the vertical support plate of the I-shaped driving member 605 and the sliding cooperation setting of the U-shaped transmission frame 701 can be used for the sliding of the I-shaped driving member 605 as above, ensuring that the driving mechanism can still continuously contact and transmit with the transmission mechanism when being driven to slide up and down, so that the driving mechanism can implement normal and effective pulling and inserting drive on the positioning plug shaft 702 through the transmission mechanism no matter what position it is driven to.

[0039] In this article, there are several points to note: 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0040] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0041] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A strength detection device for a valve cast steel part, including a horizontally placed slide bar (5). At the top of the horizontally placed slide bar (5), a U-shaped vertical support frame (501) is welded. Below the horizontally placed slide bar (5), a horizontally placed force distribution plate (503) is fixedly arranged. It is characterized by: A vertical force transmission plate (6) is slidably penetrated through the U-shaped vertical support frame (501) and the horizontally placed slide bar (5). At the bottom end of the vertical force transmission plate (6), a square driving block (601) is fixedly connected. At the bottom end of the square driving block (601), a vertical support pressing plate (602) is fixedly connected. The vertical support pressing plate (602) is slidably penetrated and cooperated with the horizontally placed force distribution plate (503). At both ends of the horizontally placed force distribution plate (503), two top pressure swing plates (504) are symmetrically rotatably connected. At both ends of the rotating shaft of the top pressure swing plate (504), two L-shaped transmission parts (5041) are symmetrically fixedly connected. A connecting rod (606) is rotatably connected between the first end of the L-shaped transmission part (5041) and the square driving block (601). At the top ends of the square driving block (601) and the vertical force transmission plate (6), two L-shaped mounting plates (603) are symmetrically fixedly connected. On the L-shaped mounting plates (603), a U-shaped mounting frame (604) is fixedly connected. An I-shaped driving part (605) is slidably mounted on the two U-shaped mounting frames (604). At the bottom part of the horizontally placed slide bar (5), two longitudinally placed limiting shafts (s5011) are symmetrically fixedly connected. On the two longitudinally placed limiting shafts (5011), a horizontally placed slide plate (7) is slidably mounted in the form of spring pushing. Inside the horizontally placed slide plate (7), a positioning insertion shaft (702) is fixedly connected. Outside, a U-shaped transmission frame (701) is fixedly connected. The I-shaped driving part (605) is slidably penetrated and cooperated with the U-shaped transmission frame (701).

2. A valve steel casting strength testing device according to claim 1, characterized in that: Two positioning holes are vertically and spacedly penetrated through the vertical force transmission plate (6). The positioning insertion shaft (702) is selectively penetrated and inserted into the two positioning holes. At the top of the horizontally placed slide bar (5), a square rod sleeve (505) is welded at the part between the two vertical support side plates of the U-shaped vertical support frame (501). The vertical force transmission plate (6) is slidably penetrated and cooperated with the square rod sleeve (505). The positioning insertion shaft (702) is slidably penetrated through the two horizontal side walls of the square rod sleeve (505).

3. The valve casting strength testing equipment according to claim 1, characterized in that: The spring for pushing the horizontally placed slide plate (7) is sleeved on the longitudinally placed limiting shaft (5011) and is compressed and clamped between the horizontally placed slide plate (7) and the U-shaped vertical support frame (501). At the tail end of the longitudinally placed limiting shaft (5011), a stop disk (5012) is fixedly connected. The horizontally placed slide plate (7) abuts against the stop disk (5012).

4. A valve steel casting strength testing device according to claim 1, characterized in that: At the middle position of the bottom of the horizontally placed slide bar (5), two vertical support force transmission plates (502) are symmetrically welded. At the bottom ends of the two vertical support force transmission plates (502), a horizontally placed force distribution plate (503) is welded. The square driving block (601) is located between the two vertical support force transmission plates (502) and is slidably fitted with the inner sides of the two vertical support force transmission plates (502).

5. The valve casting strength testing equipment according to claim 1, characterized in that: At the middle part of the I-shaped driving part (605), a T-shaped handle plate (6051) is welded. The vertical support plate of the I-shaped driving part (6) abuts against the inner side of the horizontal side plate of the U-shaped transmission frame (701).

6. The valve casting strength testing equipment according to claim 1, characterized in that: It also includes a "Y"-shaped base (1), a "Y"-shaped vertical frame (101) is welded to the top of the "Y"-shaped base (1), and a horizontal slide rod (5) is slidably mounted on two vertical support rods of the "Y"-shaped vertical frame (101); Two top-pressure oil cylinders (4) are symmetrically mounted on the bottom of the top side rod of the U-shaped vertical frame (101), and the head ends of the piston rods of the two top-pressure oil cylinders (4) are fixedly connected to the horizontal sliding rod (5).

7. The valve casting strength testing equipment according to claim 6, characterized in that: An electric control box (8) is fixedly mounted on a vertical support rod of the U-shaped vertical frame (101), and a control unit for controlling the extension and contraction of the top pressure cylinder (4) and monitoring and setting the ejection pressure of the top pressure cylinder (4) is provided inside the electric control box (8).

8. The valve casting strength testing equipment according to claim 6, characterized in that: Two rows of threaded fixing holes (102) are symmetrically provided on the inner longitudinal connecting plate of the said "Y"-shaped base (1), and two T-shaped load-bearing plates (2) are symmetrically installed on the top of the longitudinal connecting plate. The T-shaped load-bearing plates (2) are locked and fixed with the two rows of threaded fixing holes (102) by bolts in an optional manner; The cast steel plate (3) to be tested is placed on the top of the two T-shaped bearing plates (2). When the two top pressure swing plates (504) are positioned in the vertical support state, they are used to follow the horizontal slide bar (5) to slide down and press into contact with the cast steel plate (3), and perform a four-point bending strength test on the cast steel plate (3). When the vertical support top pressure plate (602) slides down and extends, it is used to follow the horizontal slide bar (5) to slide down and press into contact with the middle part of the cast steel plate (3), and perform a three-point bending strength test on the cast steel plate (3).

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