Pressure detection clamping mechanism for malleable cast iron elbow
By designing an upper pressure mold with a semi-circular arc-shaped clamping groove, the problem of adjusting the clamping posture of malleable iron elbows was solved, thus achieving accuracy in the detection posture and reliability in the detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 杨建钢
- Filing Date
- 2023-09-12
- Publication Date
- 2026-05-15
AI Technical Summary
The existing malleable iron elbow clamping mechanism cannot adjust the clamping posture, resulting in inaccurate test results.
A pressure-checking clamping mechanism including an upper pressure die and a lower pressure die was designed. The fixing piece of the upper pressure die is a semi-circular arc-shaped locking groove, which can correct the misalignment of the placement angle of the malleable iron elbow and ensure that the posture meets the requirements.
This ensures the accuracy of the malleable iron elbow's posture during testing, improves the accuracy of testing, and avoids air leakage affecting the test results.
Smart Images
Figure CN224239295U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of malleable iron elbow clamping technology, specifically relating to a pressure-sensing clamping mechanism for malleable iron elbows. Background Technology
[0002] After the malleable iron elbow is manufactured, it needs to be tested for defects such as sand holes that could cause air leakage. This testing requires clamping and fixing the malleable iron elbow for inspection. Existing clamping mechanisms use two mutually moving molds to hold the elbow. If the elbow's orientation is misaligned before clamping, its orientation after clamping will differ significantly from the intended orientation, thus affecting the accuracy of the final inspection. Utility Model Content
[0003] This invention overcomes the shortcomings of the prior art by proposing a pressure-sensing clamping mechanism for malleable iron elbows, thus solving the problem that current clamping mechanisms cannot adjust the posture of malleable iron elbows.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution.
[0005] A pressure-sensing clamping mechanism for malleable iron elbows includes a square fixed frame. A downward pressure cylinder is provided on the top plate of the fixed frame, and an upper pressure mold is fixedly provided at the end of the piston rod of the downward pressure cylinder. A downward pressure mold is fixedly provided on the upper surface of the bottom plate of the fixed frame. The upper pressure mold includes a fixed base. Fixed grooves are symmetrically provided on the left and right end faces of the fixed base. A left fixed piece and a right fixed piece are respectively fixed in the fixed grooves on both sides. The left fixed piece and the right fixed piece include a vertical section and an inclined section. The vertical section is fixed in the fixed groove. The upper edge of the inclined section is fixedly connected to the lower edge of the vertical section. The lower edge of the inclined section is inclined towards the inside of the fixed base. A semi-circular arc-shaped snap-fit groove is provided at the center of the lower edge of the inclined section.
[0006] Furthermore, the piston rod of the pressing cylinder is vertically downward, the cylinder body of the pressing cylinder is fixedly connected to the upper end face of the top plate of the fixed frame, and the piston rod of the pressing cylinder passes vertically downward through the top plate of the fixed frame; a horizontal upper fixing plate is fixedly installed at the end of the piston rod of the pressing cylinder, and the center of the upper end face of the upper fixing plate is fixedly connected to the end of the piston rod of the pressing cylinder.
[0007] Furthermore, two vertical guide rods are symmetrically arranged on the left and right sides of the upper end face of the upper fixed plate, and two left and right symmetrical guide cylinders are arranged on the top plate of the fixed frame. The guide cylinders are provided with guide holes that run vertically through them, and the upper ends of the two guide rods are respectively inserted into the guide holes of the guide cylinders on the same side.
[0008] Furthermore, the fixing base is a square block structure. The upper end face of the fixing base is fixedly connected to the center of the lower end face of the upper fixing plate. The fixing grooves on the left and right sides of the fixing base are connected to the lower end face of the fixing base. Two internal threaded holes are provided on the bottom surface of the two fixing grooves.
[0009] Furthermore, the upper edge of the vertical section contacts the upper edge of the fixing groove. Two countersunk holes are provided on the vertical section, and the two countersunk holes on the vertical section correspond to the two internal threaded holes on the bottom surface of the fixing groove. Two screws pass through the countersunk holes on the vertical section and are screwed into the internal threaded holes on the bottom surface of the fixing groove.
[0010] Furthermore, both the vertical and inclined sections are square plate-like structures.
[0011] Furthermore, the angle between the inclined segment and the vertical segment is 135°.
[0012] Furthermore, the lower pressing mold includes a lower fixing plate and a lower pressing mold body. The lower fixing plate is fixed to the upper surface of the bottom plate of the fixing frame, and the lower pressing mold body is fixed to the center of the upper surface of the lower fixing plate.
[0013] Furthermore, the lower die body is an L-shaped plate structure, including a left side plate and a right side plate that are symmetrical. The left side plate and the right side plate are perpendicular to each other, and the lower edge of the left side plate is fixedly connected to the lower edge of the right side plate.
[0014] Furthermore, an air inlet is provided in the center of the left side panel, and a pressure detection tube is installed at the air inlet. A pressure detection valve is installed on the pressure detection tube, which is connected to the air storage tank. A digital pressure switch is connected to the inside of the pressure detection tube through a pipeline.
[0015] The beneficial effects of this utility model compared to the prior art are as follows:
[0016] The pressure-testing clamping mechanism for malleable iron elbows provided by this utility model features a specially designed upper pressure mold. The locking grooves on the left and right fixing plates are semi-circular arcs. Even if the malleable iron elbow is slightly misaligned on the lower pressure mold body, the locking grooves can correct this during contact with the malleable iron elbow. This ensures that the malleable iron elbow meets the required posture during pressure testing and prevents air leakage due to posture issues, thus affecting the final test results. This guarantees the accuracy of the malleable iron elbow's posture during pressure testing, thereby ensuring the accuracy of the final pressure test. Attached Figure Description
[0017] The present invention will now be described in further detail with reference to the accompanying drawings:
[0018] Figure 1 This is a front view of the entire utility model;
[0019] Figure 2 This is a three-dimensional schematic diagram of the entire utility model;
[0020] Figure 3 It is a three-dimensional schematic diagram of the upper pressure mold and the malleable iron elbow;
[0021] Figure 4 This is a front view of the upper die and the malleable iron elbow;
[0022] Figure 5 This is a schematic diagram of the lower die structure;
[0023] Among them, 1 is the fixed frame, 2 is the lower pressure cylinder, 3 is the upper fixed plate, 4 is the guide rod, 5 is the guide cylinder, 6 is the upper pressure mold, 7 is the lower pressure mold, 8 is the pressure detection tube, 9 is the malleable iron elbow, 10 is the fixed seat, 11 is the left fixed piece, 12 is the right fixed piece, 13 is the vertical section, 14 is the inclined section, 15 is the snap-fit groove, 16 is the lower fixed plate, 17 is the left side plate, and 18 is the right side plate. Detailed Implementation
[0024] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.
[0025] like Figure 1 As shown in Figure 5, this utility model provides a pressure-checking clamping mechanism for malleable iron elbows, including a square fixing frame 1, with both the front and rear ends of the fixing frame 1 remaining open. A downward pressing cylinder 2 is provided on the top plate of the fixing frame 1, and an upper pressing mold 6 is fixedly provided at the end of the piston rod of the downward pressing cylinder 2; a downward pressing mold 7 is fixedly provided on the upper surface of the bottom plate of the fixing frame 1.
[0026] The piston rod of the downward-pressing cylinder 2 points vertically downwards. The cylinder body of the downward-pressing cylinder 2 is fixedly connected to the upper end face of the top plate of the fixed frame 1. The piston rod of the downward-pressing cylinder 2 passes vertically downwards through the top plate of the fixed frame 1. A horizontal upper fixed plate 3 is fixedly installed at the end of the piston rod of the downward-pressing cylinder 2, and the center of the upper end face of the upper fixed plate 3 is fixedly connected to the end of the piston rod of the downward-pressing cylinder 2. Two vertical guide rods 4 are symmetrically arranged on the left and right sides of the upper end face of the upper fixed plate 3. Two left-right symmetrical guide cylinders 5 are provided on the top plate of the fixed frame 1. The guide cylinders 5 have guide holes that run vertically through them. The upper ends of the two guide rods 4 are respectively inserted into the guide holes of the guide cylinders 5 on the same side. When the piston rod of the downward-pressing cylinder 2 extends or retracts, it drives the upper fixed plate 3 to move up and down inside the fixed frame 1. When the upper fixed plate 3 rises and falls, it drives the two guide rods 4 to slide inside the guide holes, ensuring the stability of the upper fixed plate 3 when it rises and falls.
[0027] The upper mold 6 includes a fixed base 10, a left fixed piece 11, and a right fixed piece 12. The fixed base 10 is a square block structure. The upper end face of the fixed base 10 is fixedly connected to the center of the lower end face of the upper fixed plate 3. A square fixing groove is symmetrically arranged on the left and right end faces of the fixed base 10. Both fixing grooves are connected to the lower end face of the fixed base 10. Two internal threaded holes are provided on the bottom surface of each fixing groove. The left fixed piece 11 and the right fixed piece 12 are symmetrically arranged in the two fixing grooves of the fixed base 10. Both the left fixed piece 11 and the right fixed piece 12 include a vertical section 13 and an inclined section 14. Both the vertical section 13 and the inclined section 14 are square plate structures. The lower edge of the vertical section 13 is fixedly connected to the upper edge of the inclined section 14. The vertical section 13 is located inside the fixing groove, and its upper edge contacts the upper edge of the fixing groove. Two countersunk holes are provided on the vertical section 13, corresponding to two internally threaded holes on the bottom surface of the fixing groove. Two screws pass through the countersunk holes on the vertical section 13 and are screwed into the internally threaded holes on the bottom surface of the fixing groove, thereby fixing the left fixing piece 11 and the right fixing piece 12 to the fixing groove of the fixing seat 10. The lower edge of the inclined section 14 is inclined towards the inside of the fixing seat 10, and the angle between the inclined section 14 and the vertical section 13 is 135°. A semi-circular locking groove 15 is provided at the center of the lower edge of the inclined section 14.
[0028] The lower mold 7 includes a lower fixed plate 16 and a lower mold body. The lower fixed plate 16 is fixed to the upper surface of the bottom plate of the fixed frame 1, and the lower mold body is fixed to the center of the upper surface of the lower fixed plate 16. The lower mold body is an L-shaped plate structure, including a left side plate 17 and a right side plate 18 that are symmetrical. The left side plate 17 and the right side plate 18 are perpendicular to each other, and the lower edge of the left side plate 17 is fixedly connected to the lower edge of the right side plate 18. An air inlet is provided at the center of the left side plate 17, and a pressure detection pipe 8 is installed at the air inlet. A pressure detection valve is provided on the pressure detection pipe 8, which is connected to an air storage tank. A digital pressure switch is connected to the inside of the pressure detection pipe 8 through a pipeline, and the pressure value inside the pressure detection pipe 8 is detected by the digital pressure switch.
[0029] The working principle of this utility model is as follows:
[0030] Before testing, the lower cylinder 2 is in a retracted state, placing the malleable iron elbow 9 on the lower die body, so that the two pipe ports of the malleable iron elbow 9 are in contact with the end faces of the left side plate 17 and the right side plate 18 of the lower die body, ensuring that the air inlet on the left side plate 17 is located inside the pipe port of the malleable iron elbow 9.
[0031] Then, the piston rod of the lower cylinder 2 extends, controlling the upper mold 6 to descend. The left fixing plate 11 and the right fixing plate 12 of the upper mold 6 descend synchronously, and the locking grooves 15 on the left fixing plate 11 and the right fixing plate 12 gradually engage with the two perpendicular outer sections of the malleable iron elbow 9. Since the locking grooves 15 on the left fixing plate 11 and the right fixing plate 12 are semi-circular, even if the malleable iron elbow 9 is slightly misaligned on the lower mold body, the locking grooves 15 can be corrected during contact with the malleable iron elbow 9, ensuring that the malleable iron elbow 9 meets the requirements in posture during the final pressure test, and will not leak air due to the posture problem of the malleable iron elbow 9, thus affecting the final test results.
[0032] When the lower pressure cylinder 2 is fully extended, the upper pressure mold 6 and the lower pressure mold body completely clamp the malleable iron elbow 9, and the two pipe openings of the malleable iron elbow 9 are completely closed by the left side plate 17 and the right side plate 18 of the lower pressure mold body.
[0033] Then, the pressure detection valve is opened, and compressed air is introduced into the fitting through the air tank and pressure detection pipe 8, so that the malleable iron elbow 9 is at a set pressure value. The pressure value inside the malleable iron elbow 9 is monitored by a digital display pressure switch. If the malleable iron elbow 9 has defects such as sand holes, air leakage will occur, causing the internal air pressure value of the malleable iron elbow 9 to drop and fail to maintain the set value. In this case, the digital display pressure switch will detect the change in the internal air pressure value of the malleable iron elbow 9 and transmit the change signal to the controller. The controller can then determine that the current malleable iron elbow 9 is a defective product. If the malleable iron elbow 9 does not have defects such as sand holes, there will be no air leakage inside the malleable iron elbow 9, and the internal air pressure value of the malleable iron elbow 9 will remain at the set value. When the digital display pressure switch detects that the internal air pressure value of the malleable iron elbow 9 has not changed within a set time period, it will output a no-change signal to the controller, and the controller can then determine that the current malleable iron elbow 9 is a qualified product.
[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A pressure-sensing clamping mechanism for malleable iron elbows, characterized in that: The device includes a square fixed frame (1), a downward pressing cylinder (2) is provided on the top plate of the fixed frame (1), and an upper pressing mold (6) is fixedly provided at the piston rod end of the downward pressing cylinder (2); a downward pressing mold (7) is fixedly provided on the upper surface of the bottom plate of the fixed frame (1); the upper pressing mold (6) includes a fixed seat (10), and fixed grooves are symmetrically provided on the left and right end faces of the fixed seat (10). Left fixed pieces (11) and right fixed pieces (12) are fixedly fixed on the fixed grooves on both sides respectively. Both left fixed pieces (11) and right fixed pieces (12) include a vertical section (13) and an inclined section (14). The vertical section (13) is fixed at the fixed groove. The upper edge of the inclined section (14) is fixedly connected to the lower edge of the vertical section (13). The lower edge of the inclined section (14) is inclined towards the inside of the fixed seat (10). A semi-circular snap-fit groove (15) is provided at the center of the lower edge of the inclined section (14).
2. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 1, characterized in that: The piston rod of the pressing cylinder (2) is vertically downward, and the cylinder body of the pressing cylinder (2) is fixedly connected to the upper surface of the top plate of the fixed frame (1). The piston rod of the pressing cylinder (2) passes vertically downward through the top plate of the fixed frame (1). A horizontal upper fixed plate (3) is fixedly installed at the end of the piston rod of the pressing cylinder (2). The center of the upper surface of the upper fixed plate (3) is fixedly connected to the end of the piston rod of the pressing cylinder (2).
3. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 2, characterized in that: Two vertical guide rods (4) are symmetrically arranged on the left and right sides of the upper end face of the upper fixed plate (3). Two left and right symmetrical guide cylinders (5) are arranged on the top plate of the fixed frame (1). The guide cylinders (5) are provided with guide holes that run through the top and bottom. The upper ends of the two guide rods (4) are respectively inserted into the guide holes of the guide cylinders (5) on the same side.
4. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 2, characterized in that: The fixing seat (10) is a square block structure. The upper end face of the fixing seat (10) is fixedly connected to the center of the lower end face of the upper fixing plate (3). The fixing grooves on the left and right sides of the fixing seat (10) are connected to the lower end face of the fixing seat (10). Two internal threaded holes are provided on the bottom surface of the two fixing grooves.
5. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 4, characterized in that: The upper edge of the vertical section (13) is in contact with the upper edge of the fixing groove. Two countersunk holes are provided on the vertical section (13). The two countersunk holes on the vertical section (13) correspond to the two internal threaded holes at the bottom of the fixing groove. Two screws pass through the countersunk holes on the vertical section (13) and are screwed into the internal threaded holes at the bottom of the fixing groove.
6. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 1, characterized in that: Both the vertical section (13) and the inclined section (14) are square plate structures.
7. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 1, characterized in that: The angle between the inclined segment (14) and the vertical segment (13) is 135°.
8. The pressure-sensing clamping mechanism for malleable iron elbows according to claim 1, characterized in that: The lower mold (7) includes a lower fixing plate (16) and a lower mold body. The lower fixing plate (16) is fixed to the upper surface of the bottom plate of the fixing frame (1), and the lower mold body is fixed to the center of the upper surface of the lower fixing plate (16).
9. A pressure-sensing clamping mechanism for malleable iron elbows according to claim 8, characterized in that: The lower die body is an L-shaped plate structure, including a left side plate (17) and a right side plate (18) that are symmetrical. The left side plate (17) and the right side plate (18) are perpendicular to each other, and the lower edge of the left side plate (17) is fixedly connected to the lower edge of the right side plate (18).
10. A pressure-sensing clamping mechanism for malleable iron elbows according to claim 9, characterized in that: An air inlet is provided at the center of the left side plate (17), and a pressure detection tube (8) is installed at the air inlet. A pressure detection valve is provided on the pressure detection tube (8). The pressure detection tube (8) is connected to the air storage tank. A digital pressure switch is connected to the inside of the pressure detection tube (8) through a pipeline.