An annular clamp for clamping a high pressure flange and method of use
By using ring clamps to clamp the flanges and utilizing the convex and concave fit of the clamp teeth and arc grooves, the problem of easy loosening of high-pressure flange connections is solved, achieving a stable and reliable connection and improving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHONGKEJUXIN CLEAN ENERGY &HOT FORGING EQUIP RES & DEV CO LTD
- Filing Date
- 2026-04-28
- Publication Date
- 2026-06-12
AI Technical Summary
Traditional high-pressure flange connections are prone to loosening, leading to bolt breakage and posing safety hazards. They cannot provide a stable and reliable connection under varying pressure conditions.
The flanges are clamped and fixed by a ring clamp. By setting the clamp teeth and the arc groove convex and concave fit, the connection distance is adjusted by the relative rotation of the flanges, so as to achieve stable engagement of the clamp teeth and improve the connection reliability.
It achieves stability and safety in high-pressure flange connections, is easy to install and remove, has strong pressure resistance, and avoids the risk of breakage caused by loose bolts.
Smart Images
Figure CN122191389A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a flange connection clamp, particularly to an annular clamp for clamping high-pressure flanges, and also to a method of using the clamp, belonging to the field of mechanical manufacturing technology. Background Technology
[0002] Traditionally, high-pressure flanges are connected mostly using bolts. The advantage is ease of maintenance; the disadvantages are that bolts are prone to loosening, leading to leaks. In operating conditions with constantly changing pressure, such as the high-pressure accumulators often used in hydraulic forging machines, the sudden increase in pressure can sometimes cause the fixing bolts to break due to impact, resulting in serious accidents and posing a significant threat to production safety. Therefore, it is necessary to change the existing connection method between high-pressure flanges to ensure a stable and reliable connection. Summary of the Invention
[0003] This invention proposes a ring clamp for clamp-on high-pressure flanges and a method of using it. The ring clamp is used to engage the clamp-on flanges, thereby improving the reliability of the clamp-on flange connection.
[0004] To achieve the above objectives, the present invention proposes the following technical solution: an annular clamp for clamping high-pressure flanges, comprising a flange, wherein the flange is disposed at the end of a cylinder and on a blind plate, and the flange on the cylinder is clamped and fixed with the flange on the blind plate or the flanges on both cylinders, characterized in that: The flange on the cylinder body is fixed to the flange on the blind plate or the flanges on both cylinder bodies by using ring clamps; The annular clamp is a ring composed of multiple clamp blocks, and the cross-section of the ring is C-shaped, with the C-shaped jaws clamping the two flanges; The back of the bayonet and the flange are respectively provided with locking teeth. The outer edge of the locking teeth is a boss and the inner ring is a groove. The boss and the groove engage. The flange end face is provided with a plurality of arc-shaped grooves or arc-shaped protrusions of the same shape and evenly distributed. The arc-shaped grooves are configured to be deep at one end and shallow at the other end. The flange end face and the shallow end of the arc-shaped grooves are on the same plane. The arc-shaped protrusions are configured to be high at one end and low at the other end. The arc-shaped protrusions and the flange are integral, and their lower end is on the same plane as the flange end face. Two flanges with arc-shaped grooves are clamped together, and an arc-shaped gasket is placed in the cavity between the two arc-shaped grooves. The shape of the arc-shaped gasket is similar to that of the cavity and is fitted with the cavity with a clearance. A flange with an arc groove is clamped to a flange with an arc convex shape, wherein the arc convex shape and the arc groove are in clearance fit.
[0005] Preferably, the annular clamp is composed of 3 to 6 clamp blocks.
[0006] Furthermore, bolts are used to fix the clamp blocks together.
[0007] The above-mentioned method for installing and removing the ring clamp: 1. Two flanges with arc-shaped grooves: Step (1): Put the two flanges together so that the arc grooves on the two flanges face each other, align the shallow end of the arc groove on one flange with the deep end of the arc groove on the other flange, and place an arc gasket in the cavity formed by the two arc grooves facing each other. Step (2): Secure the clamp blocks one by one onto the flange in sequence, with the protrusions and grooves of the clamp teeth corresponding to the protrusions and grooves of the flange teeth respectively. Step (3): Use bolts to fix the clamp blocks described in step (2) into a ring clamp; Step (4): Rotate the two flanges relative to each other. The arc-shaped gasket presses the flange end face to make the two flanges separate along the axial direction. The locking teeth mentioned in step (1) engage. Continue to rotate the flange. The locking teeth gradually tighten to complete the clamp installation. Step (5) Rotate the two flanges in the opposite direction as described in step (4), the arc-shaped gasket slides into the arc-shaped groove, the end faces of the two flanges gradually come into contact, and the locking teeth are released; Step (6): Loosen the bolts and remove the bolts and clamps; Step (7): Separate the two flanges, remove the arc gasket, and complete the clamp removal.
[0008] A flange with an arc-shaped groove and a flange with an arc-shaped convex shape: Step (1): Align the two flanges together, with the arc groove and the arc convex opposite each other, and the arc convex embedded in the arc groove; Step (2): Fit multiple clamp blocks one by one onto the mating flanges, with the bosses and grooves on the clamps facing the grooves and bosses on the flanges; Step (3): Use bolts to fix the clamp blocks described in step (2) into a ring clamp; Step (4): Rotate the flange relative to each other, and press the flange end face with the arc-shaped convex to make the two flanges that are mated open and separate along the axis. Step (1): The two locking teeth engage. Continue to rotate the flange and the locking teeth gradually tighten to complete the clamp installation. Step (5): Rotate the two flanges in opposite directions according to step (4), slide the arc-shaped protrusion into the arc-shaped groove, gradually fit the end faces of the two flanges together, and release the two locking teeth; Step (6): Loosen the bolts and remove the bolts and clamps; Step (7): Separate the two flanges to complete the removal of the clamps.
[0009] This invention uses a special annular clamp to clamp and engage two flanges. Clamping teeth are provided on the clamp's opening and the back of the flanges, and arc-shaped grooves are provided on the end faces of both flanges. Alternatively, an arc-shaped groove can be provided on one flange's end face, and an arc-shaped protrusion on the other flange's end face. By rotating the flanges relative to each other, the distance between the flange clamping surfaces can be adjusted using the arc-shaped pad or protrusion, achieving stable engagement between the clamping teeth on the two flanges and the clamping teeth on the annular clamp. This improves the flange clamping connection performance and ensures safety and reliability.
[0010] This invention has the advantages of convenient loading and unloading, stable and reliable connection, and strong pressure resistance. Attached Figure Description
[0011] Appendix Figure 1 This is a partial sectional view of the main view of the clamping flange of the present invention. Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the cross-sectional structure along the middle AA direction; Appendix Figure 3 For the appendix Figure 1 Schematic diagram of the cross-sectional structure in the middle BB direction; Appendix Figure 4 , 5 Figures 6, 7, and 8 show an embodiment of a clamping flange with one flange having an arc-shaped convex shape and the other having an arc-shaped groove. Appendix Figure 4 A curved convex main view is provided for the end face of the cylinder flange; Appendix Figure 5 For the appendix Figure 4 A bottom view; Appendix Figure 6 Main view showing the arc-shaped groove on the end face of the cylindrical flange; Appendix Figure 7 For the appendix Figure 6 A bottom view; Appendix Figure 8 A schematic diagram showing the mating state of two flanges: one with an arc-shaped protrusion on the end face of the cylindrical flange and the other with an arc-shaped groove on the end face of the cylindrical flange. Appendix Figure 9 , 10 Figures 11, 12, and 13 show examples of two flanges clamped together, all with arc-shaped grooves. Appendix Figure 9 and 11 A front view showing the arc-shaped groove on the end face of the cylindrical flange; Appendix Figure 10 For the appendix Figure 9 A bottom view; Appendix Figure 12 For the appendix Figure 11 A bottom view; Appendix Figure 13 A schematic diagram showing two flanges with arc grooves on both flange ends of the cylinder body, with arc gaskets placed inside the two arc grooves.
[0012] In the attached diagram, 1 and 1' are cylinders, 101 and 101' are flanges, 102 is an arc-shaped protrusion, 102' is an arc-shaped groove, 2 and 2' are cylinders, 201 and 201' are flanges, 202 and 202' are arc-shaped grooves, 3, 3', and 3" are clamping blocks, 4 is a bolt, 5 is an arc-shaped gasket, a is a protrusion of the clamping block teeth, b is a groove of the clamping block teeth, c is a protrusion of the clamping flange teeth, and d is a groove of the clamping flange teeth. Detailed Implementation
[0013] As attached Figure 4 , 5 As shown in Figures 6 and 7, an arc-shaped protrusion 102 is provided on the end face of the flange 101 on the cylinder 1, and an arc-shaped groove 202 is provided on the end face of the flange 102 on the cylinder 2. Figure 5 As shown, the arc-shaped protrusion 102 and the flange 101 end face are arranged sequentially and evenly along the circumference, with attachments Figure 7 The arc-shaped groove 202 and the flange 201 end face shown are arranged sequentially and evenly along the circumference.
[0014] As attached Figure 8 As shown, Figure 4 and Figure 6 The cylinders 1 and 2 are aligned, and the arc-shaped protrusion 102 is aligned with the arc-shaped groove 202.
[0015] As attached Figure 9 , 10 As shown in Figures 11 and 12, an arc-shaped groove 102' is provided on the end face of flange 101' on cylinder 1', and an arc-shaped groove 102' is provided on the end face of flange 201' on cylinder 2'. Figure 10 As shown, the end faces of the arc-shaped groove 102' and the flange 101' are sequentially spaced and evenly arranged along the circumference, with attached... Figure 12 As shown, the end faces of the arc groove 202' and the flange 201' are arranged sequentially and evenly along the circumference.
[0016] As attached Figure 13 As shown, Figure 9 and Figure 11 The cylinders 1' and 2' are aligned, and the arc grooves 102' and 202' are aligned. An arc pad 5 is inserted into the cavity where the arc grooves 102' and 202' are aligned.
[0017] As attached Figure 1 , 2As shown in Figure 3, clamp blocks 3, 3', and 3" engage with the two pairs of flanges. The C-shaped openings on clamp blocks 3, 3', and 3" fit onto the flanges. Under the action of gravity, the teeth (including boss a and groove b) on the opening surfaces of the C-shape of clamp blocks 3, 3', and 3" engage with the teeth (including boss c and groove d) on the flange 101 on the cylinder 1. Bolt 4 fixes clamp blocks 3, 3', and 3" together to form a ring clamp.
[0018] Attachment Figure 8 The cylinder 1 shown rotates counterclockwise, and the arc-shaped protrusion 102 slides counterclockwise spirally in the arc-shaped groove 202. The arc-shaped protrusion 102 slides toward the end face of the flange 201, so that the clamping flanges of the cylinder 1 and the cylinder 2 are separated. The locking teeth (including: boss a and groove b) of the lower opening face of the clamping blocks 3, 3', and 3" C-shaped are engaged with the locking teeth (including: boss c and groove d) on the flange of the lower cylinder 2, thus completing the clamping installation.
[0019] Remove the clamps, rotate cylinder 1 clockwise, and the arc-shaped protrusion 102 will slide clockwise into the arc-shaped groove 202. The end faces of the clamping flanges 101 and 201 of cylinder 1 and cylinder 2 will fit together. The clamping teeth (including boss a and groove b) of the lower opening face of the clamping blocks 3, 3', and 3" will separate from the clamping teeth (including boss c and groove d) on flange 201. Loosen and remove bolt 4 and clamping blocks 3, 3', and 3" and flanges 101 and 201 will separate.
[0020] Attachment Figure 13 The cylinder 1' shown rotates counterclockwise, and the arc-shaped pad 5 slides counterclockwise spirally in the arc-shaped groove 102'. The arc-shaped pad 5 slides toward the end face of the flange 201', separating the clamping flanges 101' and 201' on the cylinder 1' and cylinder 2'. The locking teeth (including boss a and groove b) on the C-shaped lower opening face of the clamping blocks 3, 3', and 3" engage with the locking teeth (including boss c and groove d) on the flange of the cylinder 2', and the clamping is installed.
[0021] Remove the clamps and rotate cylinder 1' clockwise. The arc-shaped pad 5 will slide clockwise spirally within the arc-shaped groove 102', sliding into the arc-shaped groove 202'. The end faces of the clamping flanges 101' and 201' of cylinder 1' and cylinder 2' will then fit together. The locking teeth (including boss a and groove b) on the C-shaped lower opening face of clamp blocks 3, 3', and 3" will loosen and separate from the locking teeth (including boss c and groove d) on the flange of cylinder 2'. Loosen and remove bolt 4 and clamp blocks 3, 3', and 3" and then remove the arc-shaped pad 5 to separate the two flanges.
[0022] Appendix Figure 4 and 5 The process of changing any one of the cylindrical flanges into a blind flange is the same as described above.
[0023] In some embodiments, designs that alter the axial distance between two flanges by screwing together the clamp and the flange to create flange separation and fit are similar to this design.
[0024] In some embodiments, the outer edges of the arc-shaped convex and arc-shaped groove are set at a certain distance from the outer edge of the flange, which has the same technical effect as this design and is a design similar to this design.
Claims
1. A ring clamp for clamping high-pressure flanges, comprising a flange disposed at the end of a cylinder and on a blind plate, wherein the flange on the cylinder is clamped and fixed to the flange on the blind plate or the flanges on both cylinders, characterized in that: The flange on the cylinder body is fixed to the flange on the blind plate or the flanges on both cylinder bodies by using ring clamps; The annular clamp is a ring composed of multiple clamp blocks, and the cross-section of the ring is C-shaped, with the C-shaped jaws clamping the two flanges; The bayonet opening and the back of the flange are respectively provided with locking teeth. The outer edge of the locking teeth is a boss and the inner ring is a groove. The boss and the groove engage. The flange end face is provided with a plurality of arc-shaped grooves or arc-shaped protrusions of the same shape and evenly distributed. The arc-shaped grooves are configured to be deep at one end and shallow at the other end. The flange end face and the shallow end of the arc-shaped grooves are on the same plane. The arc-shaped protrusions are configured to be high at one end and low at the other end. The arc-shaped protrusions and the flange are integral, and their lower end is on the same plane as the flange end face. Two flanges with arc-shaped grooves are clamped together, and an arc-shaped gasket is placed in the cavity between the two arc-shaped grooves. The shape of the arc-shaped gasket is similar to that of the cavity and is clearance-fitted with the cavity. A flange with an arc groove is clamped to a flange with an arc convex shape, wherein the arc convex shape and the arc groove are in clearance fit.
2. The annular clamp for clamping high-pressure flanges according to claim 1, characterized in that: The annular clamp consists of 3 to 6 clamp blocks.
3. The annular clamp for clamping high-pressure flanges according to claim 1, characterized in that: Bolts are used to fix the clamp blocks together.
4. The method of using the annular clamp for clamping two flanges as described in claim 1, characterized in that:
1. Installation and removal of clamps on both flanges with arc-shaped grooves: Install: Step (1): Put the two flanges together so that the arc grooves on the two flanges face each other, align the shallow end of the arc groove on one flange with the deep end of the arc groove on the other flange, and place an arc gasket in the cavity formed by the two arc grooves facing each other. Step (2): Secure the clamp blocks one by one onto the flange in sequence, with the protrusions and grooves of the clamp teeth corresponding to the protrusions and grooves of the flange teeth respectively. Step (3): Use bolts to fix the clamp blocks described in step (2) into a ring clamp; Step (4): Rotate the two flanges relative to each other. The arc-shaped gasket presses the flange end face to make the two flanges separate along the axial direction. The locking teeth mentioned in step (1) engage. Continue to rotate the flange and the locking teeth gradually tighten. Disassembly: Step (5) Rotate the two flanges in the opposite direction as described in step (4), the arc-shaped gasket slides into the arc-shaped groove, the end faces of the two flanges gradually come into contact, and the locking teeth are released; Step (6): Loosen the bolts and remove the bolts and clamps; Step (7): Separate the two flanges and remove the arc-shaped gasket; 2. The installation and removal of clamps between two flanges, one with an arc-shaped groove and the other with an arc-shaped convex shape. Install: Step (1): Align the two flanges together, with the arc groove and the arc convex opposite each other, and the arc convex embedded in the arc groove; Step (2): Fit multiple clamp blocks one by one onto the mating flanges, with the bosses and grooves on the clamps facing the grooves and bosses on the flanges; Step (3): Use bolts to fix the clamp blocks described in step (2) into a ring clamp; Step (4): Rotate the flange relative to each other, and press the flange end face with the arc-shaped convex to make the two flanges that are mated open and separate along the axis. Step (1): The two locking teeth engage. Continue to rotate the flange and the locking teeth gradually tighten. Disassembly: Step (5): Rotate the two flanges in opposite directions according to step (4), slide the arc-shaped protrusion into the arc-shaped groove, gradually fit the two flange end faces together, and loosen the two locking teeth; Step (6): Loosen the bolts and remove the bolts and clamps; Step (7): Separate the two flanges.