Pressure testing device and testing method for valve production

Abstract

The invention discloses a pressure testing device and method for valve production, and belongs to the technical field of valve pressure testing devices.The pressure testing device for valve production comprises a supporting plate used for containing a valve, a supporting table is arranged on one side of the supporting plate, and when the supporting plate deflects to be in a vertical state relative to the supporting table, the supporting table is arranged on the supporting plate; a valve placed on the supporting plate can fall on the supporting table, and a baffle is assembled on the inner side of the supporting plate in a sliding mode. When the supporting plate is in a horizontal state, the supporting plate is attached to the ground, so that installation of the valve is facilitated, when the supporting plate is deflected to a vertical state, the valve can be located over the supporting table and finally fall onto the supporting table, so that detection of the valve is facilitated, and in the process of injecting high-pressure water into the valve, the valve is not prone to falling off. And the limiting block arranged in the valve can abut against the inner wall of the valve, so that the supporting plate can stably drive the valve to deflect to the horizontal state, and the valve can be disassembled easily.

Description

Technical Field

[0001] The present invention relates to the technical field of valve pressure testing devices, and in particular to a pressure testing device and a testing method for valve production. Background Art

[0002] Valves are widely used, and the requirements for valves in production are relatively strict. Before the finished product is shipped, the valves need to be tested using testing equipment, including pressure resistance and sealing.

[0003] Chinese invention patent CN119086300A discloses a pressure-resistant testing device for valve production. The valve is fully shielded by the frame itself, a sealing seat, and a protective cover to avoid safety issues caused by splashing accessories or water due to excessive pressure.

[0004] The above-mentioned device places the valve to be tested on the rack and seals the valve with the sealing seat. However, in actual use, the valve needs to be moved to the top of the rack each time. Since water pipes and other structures need to be arranged under the rack, the rack has a certain height, which makes the process of moving the valve more laborious. Especially when the valve is large, this problem is more prominent. In summary, the above-mentioned device still has room for improvement.

[0005] Therefore, it is necessary to provide a pressure testing device and testing method for valve production to solve the above technical problems. Summary of the Invention

[0006] The object of the present invention is to provide a pressure testing device and testing method for valve production, so as to solve the problem that the existing device proposed in the above background technology places the valve to be tested on a rack and seals the valve with a sealing seat, but in actual use, the valve needs to be moved to the top of the rack each time. Since water pipes and other structures need to be arranged under the rack, the rack has a certain height, which makes the process of moving the valve more laborious.

[0007] Based on the above ideas, the present invention provides the following technical solutions: a pressure testing device for valve production, comprising a support plate for placing the valve, a support platform provided on one side of the support plate, and when the support plate is deflected to a vertical state relative to the support platform, the valve placed on the support plate can fall onto the support platform, a baffle is slidably mounted on the inner side of the support plate, and a press sleeve is mounted at the center of the baffle, a connecting pipe is mounted on one side of the press sleeve, and a slider is provided on the outer sliding sleeve of the connecting pipe, and the slider is in sealing cooperation with the press sleeve; A core shaft is coaxially arranged in the connecting tube, and the slider and the core shaft are matched through a limit assembly. A plurality of top shafts are slidingly arranged on the outer wall of the connecting tube. The top shaft is located at one end outside the connecting tube and is plugged with a limit block. The limit block is provided with a first inclined surface that matches the valve. When the valve is deflected to a vertical state, the top shaft can approach the core shaft so that the limit block is retracted into the inner cavity of the valve. When the water pressure inside the valve gradually increases, the slider can move relative to the core shaft, thereby driving the core shaft to rotate through the limit assembly. During this process, the core shaft can squeeze the top shaft so that the limit block is pressed against the inner wall of the valve.

[0008] As a further solution of the present invention: the limiting assembly includes an arc groove arranged on the outer wall of the core shaft, a limiting rod is fixedly arranged on the inner wall of the slider, and a penetrating strip groove is opened on the tube wall of the connecting tube, so that one end of the limiting rod passes through the strip groove and can cooperate with the arc groove.

[0009] As a further solution of the present invention: the outer wall of the core shaft is provided with a recessed portion, and the bottom end of the recessed portion is a conical surface, and a plurality of partitions are fixedly provided at the recessed portion, and the plurality of partitions are distributed in a ring array, so that the end of the top shaft away from the limit block can be located between two adjacent partitions, and the end surface of the top shaft close to the partition is a spherical surface.

[0010] As a further solution of the present invention: an L-shaped elbow is fixedly provided on the outer wall of the connecting pipe, and a lifting block is slidably provided near the bottom end of the elbow, the lifting block is sealed with the elbow, and an air hole is provided at the bottom end face of the elbow, and a positioning rod is elastically connected to the top end of the elbow, the positioning rod passes through the wall of the connecting pipe and slides with it, and an annular groove that cooperates with the positioning rod is provided on the outer peripheral wall of the core shaft, and a pull rope is fixed between the positioning rod and the lifting block.

[0011] As a further solution of the present invention: both ends of the connecting tube are in a closed state, the bottom end of the core shaft passes downward through the connecting tube and slides with the connecting tube, an annular plate is fixedly provided at the bottom end face of the connecting tube, and a plurality of protrusions are fixedly provided on the inner wall of the annular plate, the end of the protrusion close to the core shaft is set as a third inclined surface, a protrusion is elastically connected to the outer wall of the core shaft, and the end of the protrusion away from the core shaft is provided with a second inclined surface, and the core shaft can only rotate in one direction relative to the connecting tube through the cooperation of the protrusion and the protrusion.

[0012] As a further solution of the present invention: a through hole is opened at the center of the support platform, and a water pipe is fixedly provided at the bottom end of the support platform, and one end of the water pipe is connected to the through hole.

[0013] As a further solution of the present invention: a sliding bar is fixedly provided on the outer wall of the sliding block, and a guide groove for slidingly cooperating with the sliding bar is opened on the inner wall of the pressing sleeve.

[0014] As a further solution of the present invention: a sliding sleeve is fixedly provided on the inner wall of the connecting tube, the core shaft passes through the sliding sleeve and slides with the sliding sleeve, and a clamping block is fixedly provided on the outer wall of the core shaft, and the clamping block is located above the sliding sleeve.

[0015] As a further solution of the present invention: a connecting plate is fixedly provided on the outer side surface of the support plate, and a sleeve is fixedly provided on one end of the connecting plate away from the support plate, and a bracket is provided at the sleeve so that the sleeve is rotatably installed on the bracket.

[0016] A method for performing valve pressure testing using the above-mentioned pressure testing device for valve production includes the following steps: placing the valve on the inner side of a support plate, driving the support plate to deflect to a vertical state, so that the valve can be directly above the support platform; when the valve is in the vertical state, the limit block can be retracted into the inside of the valve, so that the valve can fall onto the support platform to facilitate pressure testing of the valve; after the test is completed, the support plate is driven to flip and reset, so that the support plate is deflected to a horizontal state.

[0017] Compared with the prior art, the beneficial effects of the present invention are: when the support plate is in a horizontal state, the support plate is in contact with the ground, which is conducive to the installation of the valve; when the support plate is deflected to a vertical state, the valve can be directly above the support platform and eventually fall onto the support platform, which is conducive to the detection of the valve; and, in the process of injecting high-pressure water into the valve, the limit block placed inside the valve can be pressed against the inner wall of the valve, so that the support plate can stably drive the valve to deflect to a horizontal state, which is conducive to the disassembly of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the support plate of the present invention in a horizontal state; Figure 3 This is a schematic diagram of the cooperation between the pressing sleeve and the baffle of the present invention; Figure 4 It is a schematic diagram of the connection structure between the baffle and the support plate of the present invention; Figure 5 It is a schematic diagram of the internal structure of the connecting pipe of the present invention; Figure 6 This invention Figure 5 A schematic diagram of the enlarged structure at point A; Figure 7 This is a schematic diagram of the cooperation between the top shaft and the partition plate of the present invention; Figure 8 This is a schematic diagram of the structure of the sliding sleeve and the clamping block of the present invention; Figure 9It is a schematic diagram of the annular plate structure of the present invention; Figure 10 This is a schematic diagram of the cooperation between the bump and the protrusion of the present invention; Figure 11 Schematic diagram of the slider structure of the present invention.

[0020] In the figure: 1, support plate; 101, connecting plate; 102, sleeve; 103, boss; 104, rotating shaft; 2, water pipe; 3, support platform; 4, valve; 401, flange; 5, baffle; 501, slide plate; 502, stepped hole; 6, pressure plate; 7, top plate; 8, screw; 9, connecting pipe; 901, strip groove; 10, core shaft; 1001, arc groove; 1002, straight groove; 1003, block; 1004, annular groove; 1005, conical surface; 1 1. Limit block; 1101. First inclined surface; 12. Press sleeve; 1201. Groove; 13. Slider; 1301. Limit rod; 1302. Slide bar; 14. Top shaft; 1401. Spherical surface; 15. Partition; 16. Sliding sleeve; 17. Bend pipe; 1701. Air hole; 1702. Fixed plate; 18. Pull rope; 19. Lifting block; 20. Positioning rod; 21. Protrusion; 2101. Second inclined surface; 22. Protrusion; 2201. Third inclined surface; 23. Annular plate. DETAILED DESCRIPTION

[0021] like Figures 1-10 As shown, a pressure testing device and testing method for valve production includes a support plate 1 for supporting a valve 4. The support plate 1 can be an arc-shaped structure. A baffle 5 is slidably mounted on the inner side of the support plate 1 and near the end. The baffle 5 can be elastically connected to the support plate 1. Combine Figure 1-Figure 2 As shown, a connecting plate 101 is fixedly provided on the outer side of the support plate 1 by bolts, and a sleeve 102 is fixedly provided on the end of the connecting plate 101 away from the support plate 1. In order to drive the sleeve 102 to rotate, a bracket can be provided at the sleeve 102 so that the sleeve 102 is rotatably mounted on the bracket. Specifically, a driving motor is provided at the bracket, and the output shaft of the driving motor is in transmission connection with the sleeve 102, thereby driving the support plate 1 to deflect. Figure 1 FIG2 shows a schematic diagram of the support plate 1 rotating to a vertical state. At this time, the valve 4 placed inside the support plate 1 can be in a vertical state and fall onto the support platform 3, which is conducive to pressure testing the valve 4. Figure 2 The schematic diagram shows the support plate 1 deflected to a horizontal state. At this time, it is convenient to unload the valve 4 from the support plate 1 and also convenient to install a new valve 4.

[0022] In order to prevent the valve 4 from sliding off during the deflection of the support plate 1, a pressing sleeve 12 is installed on the baffle 5. Figure 3As shown, the top wall of the baffle 5 is provided with a stepped hole 502 that matches the pressing sleeve 12, so that the pressing sleeve 12 can be placed at the stepped hole 502, combined with Figure 3 、 Figure 8 As shown, the pressing sleeve 12 is provided with a groove 1201 on one side close to the baffle 5, and a connecting pipe 9 is provided at the groove 1201. Specifically, the connecting pipe 9 can be fixedly matched with the pressing sleeve 12 by means of threaded connection or bolt connection, so that the connecting pipe 9 and the pressing sleeve 12 are detachable. The connecting pipe 9 passes through the stepped hole 502. Figure 8 As shown, a slider 13 is slidably sleeved on the outside of the connecting tube 9. The slider 13 is an annular structure and is slidably assembled in the groove 1201. A core shaft 10 is coaxially arranged in the connecting tube 9. The core shaft 10 can slide along its axial direction relative to the connecting tube 9. The slider 13 and the core shaft 10 are matched by a limit assembly, so that the slider 13 can drive the core shaft 10 to rotate during its movement relative to the core shaft 10. Combine Figure 1-Figure 5 As shown, multiple groups of top shafts 14 are slidably provided on the outer peripheral wall of the connecting pipe 9 and near the bottom end. The top shaft 14 is located at one end of the outer side of the connecting pipe 9 and is plugged with a limit block 11. Of course, the limit block 11 and the top shaft 14 can be fixedly connected by bolts to facilitate replacement of the limit block 11. The limit block 11 is provided with a first inclined surface 1101 that cooperates with the valve 4. In actual use, the support plate 1 is deflected to a horizontal state, and the valve 4 to be tested is placed on the support plate 1. Thereafter, the connecting pipe 9 is inserted into the inner cavity of the valve 4, so that the first inclined surface 1101 on the limit block 11 is against the end of the valve 4, and the end of the connecting pipe 9 away from the limit block 11 is fixedly connected to the pressing sleeve 12. Thereafter, the support plate 1 is deflected to a vertical state to place the valve 4 on the support platform 3. Furthermore, the core shaft 10 is in contact with the top shaft 14. Through this structure, the limit block 11 can be stably placed on the outside of the end of the valve 4. When the valve 4 is deflected to a vertical state, the core shaft 10 can move downward relative to the connecting pipe 9, so that the top shaft 14 can move along its diameter direction relative to the core shaft 10, so that the limit block 11 can be retracted into the inner cavity of the valve 4, so that the valve 4 can fall onto the support platform 3 and fit into the support platform 3. In actual application, a pressure plate 6 for pressing the valve 4 is provided above the support platform 3. The pressure plate 6 is driven by an external hydraulic rod. When the valve 4 is placed on the support platform 3, , the pressure plate 6 is driven by the hydraulic rod to move downward to squeeze the baffle 5, thereby pressing the valve 4 between the support platform 3 and the baffle 5. Afterwards, water is injected into the valve 4 through the support platform 3. The pressure of the valve 4 can be detected by observing whether the valve 4 is leaking. In the process of injecting water into the valve 4, the slider 13 can move relative to the core shaft 10, thereby driving the core shaft 10 to rotate through the limit assembly. In this process, the core shaft 10 can squeeze the top shaft 14 so that the limit block 11 is pressed against the inner wall of the valve 4, so that the valve 4 can remain stable on the support plate 1 during the process of the support plate 1 being deflected to the horizontal state.

[0023] Combine Figure 2-Figure 5 As shown, the limiting assembly includes an arc groove 1001 provided on the outer wall of the core shaft 10, the arc groove 1001 is located near the top of the core shaft 10, and the outer wall of the core shaft 10 is provided with a straight groove 1002 connected to the arc groove 1001, the straight groove 1002 is parallel to the axis of the core shaft 10 and is located at the bottom end of the arc groove 1001, a limiting rod 1301 is fixedly provided on the inner wall of the slider 13, and a penetrating strip groove 901 is provided on the wall of the connecting pipe 9, one end of the limiting rod 1301 passes through the strip groove 901 and is inserted into the straight groove 1002, specifically, when the water pressure in the inner cavity of the valve 4 gradually increases, the slider 13 can be squeezed to move upward in the groove 1201, so that the core shaft 10 can be driven to rotate by the squeezing of the inner wall of the arc groove 1001 by the limiting rod 1301; Further, refer to Figure 5-Figure 7 As shown, the outer wall of the core shaft 10 is provided with a recessed portion near the top shaft 14, and the bottom end of the recessed portion is a tapered surface 1005. When the core shaft 10 moves downward relative to the connecting pipe 9, the top shaft 14 can move along the outer wall of the core shaft 10 to the tapered surface 1005, thereby causing the top shaft 14 to gradually approach the core shaft 10. During this process, the limit block 11 can be retracted into the inner cavity of the valve 4, combined with Figure 7As shown, a plurality of partitions 15 are fixedly provided in the recessed portion, and the plurality of partitions 15 are distributed in a circular array, so that the end of the top shaft 14 away from the limit block 11 can be located between two adjacent partitions 15, and the end surface of the top shaft 14 close to the partition 15 is a spherical surface 1401. When the core shaft 10 moves downward, one end of the top shaft 14 can move along the conical surface 1005 to between the two adjacent partitions 15. Thereafter, when the core shaft 10 is driven to rotate by the limit rod 1301, the above-mentioned partition 15 contacts the spherical surface 1401 on the top shaft 14, thereby squeezing the top shaft 14 to move outward relative to the connecting pipe 9, so that the limit block 11 is pressed tightly against the inner wall of the valve 4.

[0024] Reference Figure 5-Figure 6 As shown, an L-shaped elbow 17 is fixedly provided on the outer wall of the connecting pipe 9, and a lifting block 19 is slidably provided near the bottom end of the elbow 17. The lifting block 19 is sealed with the elbow 17 and combined with the elbow 17. Figure 6 As shown, an air hole 1701 is provided at the bottom end surface of the bend 17. Through this structure, the lifting block 19 moves relatively slowly relative to the bend 17. A positioning rod 20 is elastically connected to the top of the bend 17. The positioning rod 20 passes through the wall of the connecting tube 9 and slides with it. An annular groove 1004 that cooperates with the positioning rod 20 is provided on the outer peripheral wall of the core shaft 10. A pull rope 18 is fixed between the positioning rod 20 and the lifting block 19. In the initial state, one end of the positioning rod 20 is inserted into the annular groove 1004, thereby preventing the core shaft 10 from moving relative to the bend 17. The connecting tube 9 moves, and when the support plate 1 is deflected to a vertical state, the lifting block 19 can move downward relative to the bent tube 17 under the action of gravity, thereby driving the positioning rod 20 away from the core shaft 10 through the pull rope 18, which is conducive to the movement of the core shaft 10 relative to the connecting tube 9. Specifically, the air hole 1701 is set to enable the lifting block 19 to move downward slowly, thereby providing sufficient time for one end of the positioning rod 20 to separate from the annular groove 1004, and avoiding the positioning rod 20 from being separated from the annular groove 1004 when the support plate 1 is not in a vertical state.

[0025] Combine Figure 9-10 As shown, both ends of the connecting tube 9 are closed, and the bottom end of the core shaft 10 passes downward through the connecting tube 9 and slides with it. An annular plate 23 is fixedly provided at the bottom end surface of the connecting tube 9, and a plurality of protrusions 22 are fixedly provided on the inner wall of the annular plate 23. The plurality of protrusions 22 are distributed in an annular array. Figure 10As shown, the end of the protrusion 22 close to the core shaft 10 is set as a third inclined surface 2201, and the outer wall of the core shaft 10 is elastically connected to a protrusion 21 near the bottom end, and the end of the protrusion 21 away from the core shaft 10 is provided with a second inclined surface 2101. In actual use, when the support plate 1 drives the valve 4 to deflect to a vertical state, the core shaft 10 can move downward relative to the connecting pipe 9, so that the protrusion 21 can pass over the connecting pipe 9 downward and be located in the annular plate 23, and the core shaft 10 can only rotate in one direction relative to the connecting pipe 9 through the cooperation of the protrusion 21 and the protrusion 22.

[0026] In the initial state, the support plate 1 is Figure 2 , at this time, the valve 4 to be tested is placed on the support plate 1, and the connecting pipe 9 is inserted into the inner cavity of the valve 4, so that the limit block 11 at one end of the connecting pipe 9 is against the outer side of the end face of the valve 4, and the end of the connecting pipe 9 away from the limit block 11 is fixedly connected to the pressing sleeve 12. Initially, the top shaft 14 is staggered with the conical surface 1005 and one end of the positioning rod 20 is inserted into the annular groove 1004, so that the core shaft 10 cannot move relative to the connecting pipe 9. Therefore, the limit block 11 can remain stable and stably support the valve 4; When the valve 4 is in the upright position, the support plate 1 is driven by the sleeve 102 to rotate to the vertical position, so that the support plate 1 is fitted with the support platform 3. At this time, the valve 4 is directly above the support platform 3. In actual use, when the support plate 1 drives the valve 4 to deflect to above the support platform 3, the limit block 11 can contact the support platform 3 or keep a certain gap between the support platform 3. As the valve 4 deflects to the vertical position, the gravity of the lifting block 19 can pull the pull rope 18, so that one end of the positioning rod 20 moves out of the annular groove 1004, so that the core shaft 10 can move downward relative to the connecting pipe 9. In this process, one end of the top shaft 14 can slide along the conical surface 1005 to between the two adjacent partitions 15, and the top shaft 14 will gradually approach the core shaft 10, so that the limit block 11 is finally retracted into the inner cavity of the valve 4, and the valve 4 falls on the center of the support platform 3. As the core shaft 10 moves downward relative to the connecting tube 9, the protrusion 21 on the core shaft 10 can move to the bottom surface of the connecting tube 9 and is located in the annular plate 23. The cooperation between the protrusion 22 and the protrusion 21 makes the core shaft 10 only rotate in one direction relative to the connecting tube 9. Afterwards, water is injected into the valve 4 through the support platform 3 to perform pressure detection on the valve 4. After the core shaft 10 moves downward relative to the connecting tube 9, the limit rod 1301 can slide along the straight groove 1002 to the bottom end position of the arc groove 1001. As the water pressure inside the valve 4 gradually increases, the slider 13 can be pushed to move upward along the groove 1201, so that the limit rod 1301 moves upward along the arc groove 1001. Movement, since the protrusion 21 is located on the bottom surface of the connecting tube 9, the core shaft 10 can be prevented from moving upward. Therefore, in the process of the limit rod 1301 moving upward along the arc groove 1001, the core shaft 10 can be driven to rotate, and then the partition 15 squeezes the spherical surface 1401 on the top shaft 14, so that the top shaft 14 moves in the direction away from the core shaft 10, which is conducive to pressing the limit block 11 against the inner wall of the valve 4. In this way, after the inspection is completed, the valve 4 can be stably placed on the support plate 1, and the valve 4 can be prevented from moving relative to the support plate 1 during the process of the support plate 1 deflecting to the horizontal state. When the support plate 1 drives the valve 4 to be in a horizontal state, it is conducive to disassembly and installation of the valve 4.

[0027] To sum up, when the support plate 1 is in a horizontal state, the support plate 1 is in contact with the ground, which is conducive to the installation of the valve 4. When the support plate 1 is deflected to a vertical state, the valve 4 can be directly above the support platform 3 and eventually fall onto the support platform 3, which is conducive to the detection of the valve 4. Moreover, in the process of injecting high-pressure water into the valve 4, the limit block 11 placed inside the valve 4 can be pressed against the inner wall of the valve 4, so that the support plate 1 can stably drive the valve 4 to deflect to a horizontal state, which is conducive to the disassembly of the valve 4.

[0028] Reference Figure 1 As shown, when the hydraulic rod drives the pressing plate 6 to move downward, the pressing plate 6 can squeeze the baffle 5 and the pressing sleeve 12 at the same time, so that the valve 4 is stably placed between the baffle 5 and the support platform 3.

[0029] Flanges 401 are installed at both ends of the valve 4 .

[0030] Combine Figure 1-Figure 2 As shown, a through hole is opened in the center of the support platform 3, and a water pipe 2 is fixedly installed at the bottom end of the support platform 3. One end of the water pipe 2 is connected to the through hole. This structure is conducive to injecting water into the valve 4.

[0031] A top plate 7 is provided on the inner side of the support plate 1. The top plate 7 is adapted to the valve 4 to support the valve 4. A screw 8 is provided on the support plate 1. The screw 8 passes through the support plate 1 and is threadedly connected thereto, but the top end of the screw 8 is rotatably connected to the top plate 7. In actual use, the valve 4 can be placed on the top plate 7, and the position of the top plate 7 can be adjusted by the screw 8, so that when the valve 4 is placed on the top plate 7, the valve 4 can be located at the center of the baffle 5. The advantage of this arrangement is that when the support plate 1 drives the valve 4 to deflect to the top of the support platform 3, the valve 4 can be located at the center position of the support platform 3.

[0032] Reference Figure 4 As shown, a slide plate 501 is fixedly provided on the outer peripheral wall of the baffle 5, and a through groove for the slide plate 501 to slide is opened on the support plate 1. A boss 103 and a vertical plate are fixedly provided on the outer wall of the support plate 1, so that the slide plate 501 is located between the boss 103 and the vertical plate, and a guide rod is fixedly provided between the boss 103 and the vertical plate. The guide rod passes through the slide plate 501 and slides with it, and a limit spring is sleeved on the outer side of the guide rod, and the limit spring is located between the vertical plate and the slide plate 501. Furthermore, a rotating shaft 104 is provided at the boss 103, and the rotating shaft 104 passes through the boss 103 and is threadedly connected thereto. The end of the rotating shaft 104 close to the slide plate 501 contacts the slide plate 501 but is not fixed. In actual use, the slide plate 501 can be squeezed by rotating the rotating shaft 104, and the position of the baffle 5 can be adjusted by cooperating with the limit spring. For example, when the length of the valve 4 is short, the slide plate 501 can be pushed to move by the rotating shaft 104, so that the position of the end of the valve 4 away from the baffle 5 relative to the support plate 1 can remain stable. The purpose of this setting is: when the support plate 1 is deflected to a vertical state, the baffle 5 can be supported by the limit spring, and when valves 4 of different lengths are deflected to a vertical state, the limit block 11 can be located at the top of the support platform 3 and close to the support platform 3; the side of the above-mentioned limit block 11 close to the valve 4 can be fixedly installed with a rubber pad to protect the valve 4.

[0033] A shaft sleeve can be fixedly installed on the outer wall of the connecting tube 9, so that the top shaft 14 passes through the shaft sleeve and the connecting tube 9 and slides with the two.

[0034] Reference Figure 6 As shown, a fixing plate 1702 is fixedly provided at the bend pipe 17, the pull rope 18 passes through the fixing plate 1702 and slides with it, and a first spring is fixedly provided between the positioning rod 20 and the fixing plate 1702. When the pull rope 18 pulls the positioning rod 20, the positioning rod 20 can compress the first spring.

[0035] Reference Figure 8As shown, the inner wall of the connecting pipe 9 is fixedly provided with a sliding sleeve 16, and the core shaft 10 passes through the sliding sleeve 16 and slides with it. The outer wall of the core shaft 10 is fixedly provided with a clamping block 1003, which is located above the sliding sleeve 16. Figure 10 As shown, a circular hole is provided at the bottom end of the connecting tube 9 for the core shaft 10 to pass through. In the initial state, the protrusion 21 is in the circular hole. When the core shaft 10 moves downward relative to the connecting tube 9 so that the block 1003 falls to the top of the sleeve 16, the core shaft 10 stops moving, and at this time the protrusion 21 can move downward out of the circular hole.

[0036] The outer wall of the core shaft 10 is provided with a notch that is slidably engaged with the protrusion 21 , and a second spring is fixedly arranged between the inner end surface of the notch and the protrusion 21 .

[0037] Reference Figure 11 As shown, a slide bar 1302 is fixedly provided on the outer wall of the slider 13, and a guide groove that slides with the slide bar 1302 is opened on the inner wall of the pressing sleeve 12. Through this structure, the slider 13 can only slide but not rotate relative to the pressing sleeve 12, so that the limiting rod 1301 can stably drive the core shaft 10 to rotate when it cooperates with the arc groove 1001.

Claims

1. A pressure testing device for valve production, comprising a support plate for placing the valve, with a support platform provided on one side of the support plate, characterized in that: When the support plate is deflected to a vertical state relative to the support platform, the valve placed on the support plate can fall onto the support platform, and a baffle is slidably mounted on the inner side of the support plate, and a press sleeve is mounted at the center of the baffle, a connecting pipe is mounted on one side of the press sleeve, and a slider is provided on the outer sliding sleeve of the connecting pipe, and the slider is sealed with the press sleeve; A core shaft is coaxially arranged in the connecting tube, and the slider and the core shaft are matched through a limit assembly. A plurality of top shafts are slidingly arranged on the outer wall of the connecting tube. The top shaft is located at one end outside the connecting tube and is plugged with a limit block. The limit block is provided with a first inclined surface that matches the valve. When the valve is deflected to a vertical state, the top shaft can approach the core shaft so that the limit block is retracted into the inner cavity of the valve. When the water pressure inside the valve gradually increases, the slider can move relative to the core shaft, thereby driving the core shaft to rotate through the limit assembly. During this process, the core shaft can squeeze the top shaft so that the limit block is pressed against the inner wall of the valve.

2. A pressure testing device for valve production according to claim 1, characterized in that: The limiting assembly includes an arc groove arranged on the outer wall of the core shaft, a limiting rod is fixedly provided on the inner wall of the slider, and a penetrating strip groove is opened on the tube wall of the connecting tube, so that one end of the limiting rod passes through the strip groove and can cooperate with the arc groove.

3. A pressure testing device for valve production according to claim 2, characterized in that: The outer wall of the core shaft is provided with a recessed portion, and the bottom end of the recessed portion is a conical surface. A plurality of partitions are fixedly provided at the recessed portion, and the plurality of partitions are distributed in a ring array, so that the end of the top shaft away from the limit block can be located between two adjacent partitions, and the end surface of the top shaft close to the partition is a spherical surface.

4. A pressure testing device for valve production according to claim 3, characterized in that: An L-shaped elbow is fixedly provided on the outer wall of the connecting pipe, and a lifting block is slidably provided near the bottom end of the elbow. The lifting block is sealed with the elbow, and an air hole is provided at the end face of the bottom end of the elbow. A positioning rod is elastically connected to the top end of the elbow, and the positioning rod passes through the wall of the connecting pipe and slides with it. An annular groove that cooperates with the positioning rod is provided on the outer peripheral wall of the core shaft, and a pull rope is fixed between the positioning rod and the lifting block.

5. A pressure testing device for valve production according to claim 4, characterized in that: Both ends of the connecting tube are in a closed state, the bottom end of the core shaft passes downward through the connecting tube and slides with the connecting tube, an annular plate is fixedly provided at the bottom end face of the connecting tube, and a plurality of protrusions are fixedly provided on the inner wall of the annular plate, the end of the protrusion close to the core shaft is set as a third inclined surface, a protrusion is elastically connected to the outer wall of the core shaft, and the end of the protrusion away from the core shaft is provided with a second inclined surface, and the core shaft can only rotate in one direction relative to the connecting tube through the cooperation of the protrusion and the protrusion.

6. A pressure testing device for valve production according to claim 1, characterized in that: A through hole is provided at the center of the support platform, and a water pipe is fixedly provided at the bottom end of the support platform, with one end of the water pipe being connected to the through hole.

7. A pressure testing device for valve production according to claim 1, characterized in that: A sliding bar is fixedly provided on the outer wall of the sliding block, and a guide groove for slidingly cooperating with the sliding bar is opened on the inner wall of the pressing sleeve.

8. The pressure testing device for valve production according to claim 1, characterized in that: A sliding sleeve is fixedly provided on the inner wall of the connecting pipe, the core shaft passes through the sliding sleeve and slides with the sliding sleeve, and a clamping block is fixedly provided on the outer wall of the core shaft, and the clamping block is located above the sliding sleeve.

9. The pressure testing device for valve production according to claim 1, characterized in that: A connecting plate is fixedly provided on the outer side surface of the support plate, and a sleeve is fixedly provided on one end of the connecting plate away from the support plate. A bracket is provided at the sleeve so that the sleeve is rotatably mounted on the bracket.

10. A method for performing valve pressure testing using the valve production pressure testing device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: placing the valve on the inner side of the support plate, driving the support plate to deflect to a vertical state so that the valve can be directly above the support platform; when the valve is in the vertical state, the limit block can be retracted into the inside of the valve so that the valve can fall onto the support platform to facilitate pressure testing of the valve; after the test is completed, driving the support plate to flip and reset so that the support plate deflects to a horizontal state.

Images