Back pressure valve pressure measuring tool with quick fixing structure

Abstract

This utility model discloses a back pressure valve pressure testing fixture with a quick-fixing structure, relating to the field of valve body testing technology. The utility model includes a frame with a U-shaped groove on one side; a pressing mechanism including a mounting block mounted on one side of the frame; a toothed plate slidably fitted inside the mounting block; an adjusting screw threaded into the toothed plate; and a rotating shaft rotatably fitted inside the mounting block via a torsion spring, with a gear mounted on the shaft, the toothed plate meshing with the gear. This utility model, through its handle fixing component, can position the handle after rotation. When the handle is rotated, it drives the adjusting screw to press against the back pressure valve and water pump on an adjustable mounting frame. Only the rotation of the handle is needed to initially fix the back pressure valve and water pump, thus eliminating the need for continuous manual support during subsequent tight fixing; a stable and tight connection can be achieved simply by adjusting the screw, facilitating subsequent testing operations.

Description

Technical Field

[0001] This utility model belongs to the field of valve body testing technology, specifically, it relates to a back pressure valve pressure testing fixture with a quick fixing structure. Background Technology

[0002] The back pressure valve operates by means of the spring force of its built-in spring: when the system pressure is lower than the set pressure, the diaphragm blocks the pipeline under the action of the spring force; when the system pressure is higher than the set pressure, the diaphragm compresses the spring, the pipeline is opened, and the liquid passes through the back pressure valve. The opening pressure of the back pressure valve can generally be adjusted.

[0003] Chinese Patent No. CN210400845U discloses a pressure testing fixture for a back pressure valve, which includes a support plate arranged vertically, an abutment plate parallel to the support plate, and a connector. The two ends of the connector are respectively fixed to the edge of the support plate and the edge of the abutment plate. The abutment plate is provided with a groove for engaging a back pressure valve flange. The axis of the back pressure valve flange is perpendicular to the abutment plate. The groove extends vertically upward through the abutment plate. An abutment block is provided between the support plate and the abutment plate. A clamping member is provided on the support plate. The clamping member causes the abutment block to press against the back pressure valve flange. A water channel communicating with the back pressure valve is opened on the abutment block.

[0004] However, in the aforementioned device, the back pressure valve is fixed by tightening bolts. While this method can secure the back pressure valve, it requires specialized tools for each tightening operation, increasing manual steps. Furthermore, during bolt tightening, the operator must continuously support the back pressure valve to maintain its position and prevent displacement or tilting. In addition, since the flange connection hole positions of different specifications of back pressure valves vary, and the existing tooling lacks an effective position adjustment mechanism, it can only adapt to the testing needs of a single model of back pressure valve. When facing test pieces of different sizes, the flange through holes are prone to inaccurate alignment, resulting in insufficient test connection stability. This not only increases the limitations of the tooling but also adversely affects the reliability of the test results. In view of this, this utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a back pressure valve pressure measuring tool with a quick fixing structure, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows: A back pressure valve pressure testing fixture with a quick-fixing structure includes: a frame, one side of which is provided with a U-shaped groove; The extrusion mechanism includes a mounting block, which is installed on one side of the frame. A toothed plate is slidably fitted inside the mounting block, and an adjusting screw is threaded inside the toothed plate. A rotating shaft is rotatably fitted inside the mounting block via a torsion spring. A gear is mounted on the rotating shaft, and the toothed plate meshes with the gear. A handle is installed at one end of the rotating shaft, and a handle fixing component is installed on one side of the mounting block. The testing mechanism includes an adjustable placement frame, on the upper side of which a test piece is mounted, and the adjustable placement frame is slidably fitted onto the bottom of the inner wall of the frame.

[0007] Optionally, the handle fixing component includes a connecting plate fixedly installed on one side of the mounting block, a first sliding groove is provided on the lower side of the connecting plate, a sliding post is elastically and slidably fitted in the first sliding groove, and a limit frame is fixed on the lower side of the sliding post; one side of the handle is arc-shaped.

[0008] Optionally, the adjustable placement frame includes two interconnected U-shaped frames, with a rubber pad fixed to one side of each U-shaped frame; the test piece includes an abutment block installed inside the U-shaped frame, with a second sliding groove on one side of the abutment block, and an extrusion head movably connected to one end of an adjusting screw, the extrusion head slidingly engaging within the second sliding groove; two guide grooves are provided at the bottom of the inner wall of the frame, with guide blocks slidingly engaging within the guide grooves, and threaded rods threaded to both sides of the U-shaped frame, one end of which is rotatably connected to the guide blocks; a movable groove is provided at the bottom of the inner wall of the frame, with a movable block slidably engaging within the movable groove and connected to the U-shaped frame, a U-shaped mounting bracket mounted on the upper side of the movable block, the rubber pad fixed within the U-shaped mounting bracket, and the U-shaped mounting bracket connected to the U-shaped frame; a water inlet is provided on the upper side of the abutment block, with internal threads on the inner circumference of the water inlet, a through groove on the side of the abutment block corresponding to the rubber pad, and a through hole on one side of the rubber pad, the through hole corresponding to the through groove.

[0009] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time: The handle fixing component allows for positioning of the rotated handle. Rotating the handle drives the adjusting screw to compress the back pressure valve and water pump on the adjustable mounting bracket. Initial fixing of the back pressure valve and water pump is achieved simply by rotating the handle, eliminating the need for continuous manual support during subsequent tight fixing. A stable and tight connection can be achieved solely by adjusting the screw, facilitating subsequent testing. Simultaneously, the adjustable mounting bracket allows for flexible adjustment of the back pressure valve's installation position, reducing misalignment issues between the back pressure valve and water pump when testing different models of test pieces. This not only broadens the tooling's compatibility with different back pressure valve models but also improves the stability of the connection between the back pressure valve and water pump during testing, contributing to the accuracy of test results. With the toothed plate and gear configuration, when the handle fixing component is released, the torsion spring's force drives the gear on the rotating shaft to rotate in the opposite direction. This allows for quick disassembly of the back pressure valve and water pump after testing, simply by releasing the handle fixing component, improving the testing efficiency of the back pressure valve.

[0010] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0011] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings: Figure 1 A schematic diagram of the overall structure of the back pressure valve pressure measuring fixture; Figure 2 This is a schematic diagram of the water inlet structure; Figure 3 This is a schematic diagram of the testing mechanism structure; Figure 4 This is a schematic diagram of the extrusion mechanism. Figure 5 This is a schematic diagram of the overall structure of the adjustable shelf; Figure 6 This is a schematic diagram of the connection structure between the U-shaped mounting bracket and the frame.

[0012] The attached diagram lists the components represented by each number as follows: Frame 1, U-shaped groove 101; The extrusion mechanism 2, mounting block 201, toothed plate 202, adjusting screw 203, handle fixing part 204, connecting plate 2041, first slide groove 2042, sliding column 2043, limit frame 2044, handle 205, rotating shaft 206, gear 207; Test mechanism 3, adjustable placement rack 301, U-shaped frame 3011, rubber pad 3012, test piece 302, abutment block 3021; 4. Second chute, 5. Extrusion head, 6. Guide groove, 7. Guide block, 8. Threaded rod, 9. Moving block, 10. U-shaped mounting bracket, 11. Water inlet, 12. Through hole, 13. Moving groove.

[0013] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Please see Figure 1-6 As shown, this embodiment provides a back pressure valve pressure measuring fixture with a quick fixing structure, including a frame 1, and a U-shaped groove 101 on one side of the frame 1; The extrusion mechanism 2 includes a mounting block 201, which is mounted on one side of the frame 1. A toothed plate 202 is slidably fitted inside the mounting block 201, and an adjusting screw 203 is threaded inside the toothed plate 202. A rotating shaft 206 is rotatably fitted inside the mounting block 201 via a torsion spring. A gear 207 is mounted on the rotating shaft 206, and the toothed plate 202 meshes with the gear 207. A handle 205 is mounted on one end of the rotating shaft 206, and a handle fixing member 204 is mounted on one side of the mounting block 201. The testing mechanism 3 includes an adjustable placement rack 301, on the upper side of which a test piece 302 is mounted, and the adjustable placement rack 301 is slidably fitted to the bottom of the inner wall of the frame 1.

[0016] The handle fixing part 204 allows for positioning of the rotated handle 205. When the handle 205 rotates, it drives the adjusting screw 203 to compress the back pressure valve and water pump on the adjustable mounting bracket 301. Only the rotation of the handle 205 is needed to initially fix the back pressure valve and water pump, eliminating the need for continuous manual support during subsequent tight fixing. A stable and tight connection can be achieved simply by adjusting the screw 203, facilitating subsequent testing. Simultaneously, the adjustable mounting bracket 301 allows for flexible adjustment of the back pressure valve's installation position, reducing the risk of issues with different water pump models during testing. The issue of misalignment between the back pressure valve and the water pump is addressed. This not only broadens the tooling's compatibility with different models of back pressure valves but also improves the stability of the connection between the back pressure valve and the water pump during testing, thus enhancing the accuracy of the test results. With the toothed plate 202 and gear 207 in place, when the handle fixing part 204 releases the limit on the handle 205, the spring force of the torsion spring will drive the gear 207 on the rotating shaft 206 to rotate in the opposite direction. This allows the back pressure valve and water pump to be quickly disassembled simply by releasing the control of the handle 205 through the handle fixing part 204 after the test, thereby improving the testing efficiency of the back pressure valve.

[0017] When testing the back pressure valve, first place the water pump to be tested in the U-shaped groove 101 and rotate the handle 205 into the handle fixing part 204. While the handle 205 is rotating, it will drive the rotating shaft 206 to rotate. The rotating shaft 206 drives the gear 207 to rotate. The rotating gear 207 drives the toothed plate 202 to move in the mounting block 201. The movement of the toothed plate 202 drives the end of the adjusting screw 203 to apply force to the adjusting placement frame 301, so that the adjustable placement frame 301 moves and gradually squeezes the water pump, so that the adjusting placement frame 301 gradually fits the water pump. At this time, the user can complete the initial positioning between the test piece 302 and the water pump. After the test piece is initially fixed, rotating the adjusting screw 203 can further compress the adjustable placement frame 301, thereby further improving the fit between the water pump 302 and the water pump until the test piece 302 and the water pump are tightly fitted, so as to facilitate the accuracy of the subsequent test results.

[0018] like Figure 2-4 As shown, the handle fixing member 204 in this embodiment includes a connecting plate 2041 fixedly installed on one side of the mounting block 201. A first sliding groove 2042 is provided on the lower side of the connecting plate 2041. A sliding post 2043 is elastically and slidably fitted in the first sliding groove 2042. A limit frame 2044 is fixed on the lower side of the sliding post 2043. One side of the handle 205 in this embodiment is arc-shaped. Specifically, a spring is installed in the first sliding groove 2042, and one end of the spring is connected to the sliding post 2043. By using an arc-shaped handle 205, a smooth pressure can be formed between its arc-shaped surface and the limiting frame 2044 during rotation. This arc-shaped contact surface forces the limiting frame 2044 to compress the spring and move upward, while simultaneously causing the sliding column 2043 to retract into the first sliding groove 2042. This reduces mechanical wear and achieves labor-saving operation. When the handle 205 is rotated into place, the limiting frame 2044 resets and locks under the action of the spring rebound force, which can form a more stable locking position for the handle. This completes the initial connection between the test piece 302 and the water pump, which not only simplifies the docking process between the test piece 302 and the water pump, but also makes the subsequent connection operation more convenient and efficient, improving the installation efficiency of the back pressure valve test.

[0019] like Figure 1-6As shown, the adjustable placement rack 301 in this embodiment includes two interconnected U-shaped frames 3011, with a rubber pad 3012 fixed to one side of each U-shaped frame 3011; the test piece 302 includes an abutment block 3021 installed inside the U-shaped frame 3011, with a second sliding groove 4 on one side of the abutment block 3021; ​​one end of the adjusting screw 203 is movably connected to a pressing head 5, which slides within the second sliding groove 4; two guide grooves 6 are provided at the bottom of the inner wall of the frame 1, with guide blocks 7 slidingly fitted within the guide grooves 6; threaded rods 8 are threaded onto both sides of the U-shaped frame 3011, with one end of the threaded rod 8 connected to the guide... The frame 1 has a movable groove 13 at the bottom of its inner wall. A movable block 9 connected to a U-shaped frame 3011 is slidably fitted in the movable groove 13. A U-shaped mounting bracket 10 is installed on the upper side of the movable block 9. A rubber pad 3012 is fixed in the U-shaped mounting bracket 10 and connected to the U-shaped frame 3011. A water inlet 11 is installed on the upper side of the abutment block 3021. An internal thread is provided on the circumference of the inner wall of the water inlet 11. A through groove is provided on the side of the abutment block 3021 corresponding to the rubber pad 3012. A through hole 12 is provided on one side of the rubber pad 3012 and corresponds to the through groove. With the compression head 5, when the adjusting screw 203 rotates, the compression head 5 can be inserted into the second slide groove 4. This reduces the direct contact between the end of the adjusting screw 203 and the abutment block 3021, significantly reducing the probability of wear on the screw end. Furthermore, with the guiding effect of the second slide groove 4, the abutment block 3021 is always kept in a stable compression state as the U-shaped frame 3011 adjusts its position. This structural design not only improves the tightness of the fit between the abutment block 3021 and the water pump, but also flexibly adapts to the docking requirements of various sizes of water pumps and the abutment block 3021, improving the versatility for different test pieces. The rubber pad 3012 reduces friction between the abutment block 3021 and the water pump during testing, extending the service life of the abutment block 3021 during frequent testing. The threaded rod 8... The rotating threaded rod 8 drives the U-shaped frame 3011 to move along the guide groove 6, thereby adjusting the lateral position of the abutment block 3021, so that water pumps of various sizes can be docked with the back pressure valve. At the same time, the moving block 9 at the bottom of the U-shaped frame 3011 slides along the moving groove 13, providing longitudinal guidance and limiting for the frame, reducing offset or tilting during adjustment, making the entire adjustment process both flexible and stable, and further expanding the tooling's adaptability to test parts of different specifications. Through the set through hole 12, the abutment block 3021 is connected to the water inlet hole of the flange ring on the water pump, so that each pressure test of the back pressure valve changes the traditional operation mode of repeatedly disassembling and assembling the flange with multiple bolts, eliminating the tedious tightening and disassembly steps, making the docking process of the back pressure valve and the water pump more convenient and faster, shortening the preparation time for a single test, and improving the overall efficiency of the back pressure valve pressure test.

[0020] In this embodiment, both threaded rods 8 are equipped with synchronous pulleys, and a synchronous belt drives the two synchronous pulleys together. A knob is installed on the upper side of one of the synchronous pulleys. With the synchronous belt, when adjusting the U-shaped frame 3011, the operator only needs to turn the knob to drive the two threaded rods 8 to rotate synchronously under the transmission of the synchronous belt and the synchronous pulley, so that the U-shaped frame 3011 can move stably. Compared with adjusting the U-shaped frame 3011 by turning the threaded rods 8 with both hands at the same time, this method requires less coordination of both hands during rotation. It not only makes the movement of the U-shaped frame 3011 more stable, but also facilitates the operation of the operator, further improving the convenience of adjusting the U-shaped frame 3011.

[0021] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. A back pressure valve pressure measuring fixture with a quick-fixing structure, characterized in that, include: A frame (1) has a U-shaped groove (101) on one side. The extrusion mechanism (2) includes a mounting block (201), which is mounted on one side of the frame (1). A toothed plate (202) is slidably fitted inside the mounting block (201), and an adjusting screw (203) is threaded inside the toothed plate (202). A rotating shaft (206) is rotatably fitted inside the mounting block (201) via a torsion spring. A gear (207) is mounted on the rotating shaft (206), and the toothed plate (202) meshes with the gear (207). A handle (205) is mounted on one end of the rotating shaft (206), and a handle fixing piece (204) is mounted on one side of the mounting block (201). The test mechanism (3) includes an adjustable placement rack (301), on the upper side of which a test piece (302) is mounted, and the adjustable placement rack (301) is slidably fitted to the bottom of the inner wall of the frame (1).

2. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 1, characterized in that, The handle fixing component (204) includes a connecting plate (2041) fixedly installed on one side of the mounting block (201). A first sliding groove (2042) is provided on the lower side of the connecting plate (2041). A sliding column (2043) is elastically and slidably fitted in the first sliding groove (2042). A limit frame (2044) is fixed on the lower side of the sliding column (2043).

3. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 1, characterized in that, One side of the handle (205) is curved.

4. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 1, characterized in that, The adjustable shelf (301) includes two interconnected U-shaped frames (3011), with a rubber pad (3012) fixed to one side of each U-shaped frame (3011).

5. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 4, characterized in that, The test piece (302) includes an abutment block (3021) installed in a U-shaped frame (3011). A second groove (4) is provided on one side of the abutment block (3021). An extrusion head (5) is movably connected to one end of the adjusting screw (203). The extrusion head (5) slides in the second groove (4).

6. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 4, characterized in that, Two guide grooves (6) are opened at the bottom of the inner wall of the frame (1). A guide block (7) is slidably fitted in the guide groove (6). Both sides of the U-shaped frame (3011) are threaded with threaded rods (8). One end of the threaded rod (8) is rotatably connected to the guide block (7).

7. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 4, characterized in that, The bottom of the inner wall of the frame (1) is provided with a moving groove (13). A moving block (9) connected to the U-shaped frame (3011) is slidably fitted in the moving groove (13). A U-shaped mounting bracket (10) is installed on the upper side of the moving block (9). A rubber pad (3012) is fixed in the U-shaped mounting bracket (10), and the U-shaped mounting bracket (10) is connected to the U-shaped frame (3011).

8. The back pressure valve pressure measuring fixture with a quick-fixing structure according to claim 4, characterized in that, The upper side of the abutment block (3021) is provided with a water inlet channel (11), and the inner wall of the water inlet channel (11) is provided with an internal thread. The abutment block (3021) is provided with a through groove on the side corresponding to the rubber pad (3012), and a through hole (12) is provided on one side of the rubber pad (3012), with the through hole (12) corresponding to the through groove.

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