PVC pipe fitting connecting and fixing structure

Abstract

This utility model discloses a PVC pipe fitting connection and fixing structure, including a connecting pipe, a sealing strip, and a pipe clamping assembly. The connecting pipe includes a connecting pipe body and a positioning ring. The inner diameter of the connecting pipe body is adapted to the outer diameter of the PVC pipe fitting. The positioning ring is fixedly connected to the middle of the connecting pipe body along its inner circumference. The inner diameter of the positioning ring is the same as the inner diameter of the PVC pipe fitting. Annular grooves are provided on opposite sides of the positioning ring, and the aforementioned sealing strip, which can mate with the end face of the PVC pipe fitting, is installed in each annular groove. Two sets of pipe clamping assemblies are provided, located at both ends of the connecting pipe body. The pipe clamping assembly includes a support ring, a slider, and a blade. The support ring is coaxially installed at both ends of the connecting pipe body. A radially penetrating groove is provided on the support ring, and the slider is disposed in the groove. The inner end of the slider is fixedly connected to the aforementioned blade. The slider slides inward so that the blade penetrates the outer surface of the PVC pipe fitting. This utility model proposes a PVC pipe fitting connection and fixing structure that reduces vibration and noise and is easy to install.

Description

Technical Field

[0001] This utility model relates to the field of connection and fixing structure technology, and in particular to a connection and fixing structure for PVC pipe fittings. Background Technology

[0002] Traditional PVC pipe fitting connection and fixing structures, as shown in patent application number CN201921123419.0, include a connection structure, a positioning block, and a hot-melt plate. During connection, the left end of the cut pipe is inserted into the left end of the connection structure, abutting against the left side of the positioning block, and the right end of the cut pipe is inserted into the right end of the connection structure, abutting against the right side of the positioning block. A plastic welding machine heats the hot-melt plate, causing the connection structure to clamp the left and right ends of the cut pipe. Although the above connection and fixing structure has many advantages, the inner side of the positioning block is not flush with the inner surfaces of the left and right ends of the cut pipe. When water flows through the positioning block at high speed, it is easy to generate vibration and noise. In addition, the above connection and fixing structure requires the use of a plastic welding machine for installation, which is inconvenient. Utility Model Content

[0003] To address the aforementioned shortcomings of existing PVC connection and fixing structures, this invention proposes a PVC pipe fitting connection and fixing structure that reduces vibration and noise and is easy to install.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A PVC pipe fitting connection and fixing structure includes a connecting pipe, a sealing strip, and a pipe clamping assembly. The connecting pipe includes a connecting pipe body and a positioning ring. The inner diameter of the connecting pipe body is adapted to the outer diameter of the PVC pipe fitting. The positioning ring is fixedly connected to the middle of the connecting pipe body along its inner circumference. The inner diameter of the positioning ring is consistent with the inner diameter of the PVC pipe fitting. Annular grooves are provided on opposite sides of the positioning ring. The aforementioned sealing strip, which can mate with the end face of the PVC pipe fitting, is installed in each of the annular grooves.

[0006] Two sets of pipe clamping assemblies are provided, located at both ends of the connecting pipe body. The pipe clamping assembly includes a support ring, a slider, and a blade. The support ring is coaxially installed at both ends of the connecting pipe body. A groove is radially provided on the support ring. The slider is placed in the groove, and the inner end is fixedly connected to the blade. The slider slides inward so that the blade penetrates the outer surface of the PVC pipe fitting.

[0007] With the above settings, firstly, the inner surface of the positioning ring can be flush with the inner surface of the PVC pipe fitting, which can reduce vibration and noise; secondly, after the blade of the pipe clamping assembly is inserted into the PVC pipe fitting, it can prevent the PVC pipe fitting from being pulled out, eliminating the need for a plastic welding machine and making installation more convenient.

[0008] Furthermore, the connecting tube also includes connecting rings coaxially fixed to both ends of the connecting tube body, and a support ring rotatably connected to the inner side of the connecting ring. The inner side of the connecting ring is provided with a receiving groove that can accommodate the outer end of the slider. When the outer end of the slider is placed in the receiving groove, the blade is retracted in the groove. The outer end of the slider is provided with a first inclined surface. When the connecting tube body is rotated, the first inclined surface is squeezed by the inner wall of the connecting ring, driving the slider to move inward.

[0009] With the above setup, the blade can be inserted into the PVC pipe fitting simply by rotating the main body of the connecting pipe, further simplifying the installation.

[0010] Furthermore, the side of the support ring closest to the positioning ring abuts against the end face of the connecting pipe body, a groove is provided on the inner side of the connecting ring along the circumferential direction, and a clamp head is fixedly connected on the outer side of the support ring along the circumferential direction. The clamp head is set in the groove, and the side of the clamp head away from the positioning ring abuts against the side wall of the groove.

[0011] The above settings enable the support ring to rotate stably at the end of the connecting pipe body.

[0012] Furthermore, the connecting ring is made of plastic, and a second bevel is provided on the outer periphery of the clamp to allow the support ring to be inserted into the connecting ring. The side of the second bevel closest to the positioning ring slopes inward and extends to the outer surface of the support ring.

[0013] The above setup makes it easy to insert the support ring into the connecting ring.

[0014] Furthermore, the sealing strip includes a sealing part and a deformation part, both of which are annular structures. The width of the sealing part is adapted to the width of the groove of the annular groove. Two deformation parts are provided and fixedly connected to the side of the sealing part near the bottom of the annular groove. The two deformation parts fork and abut against the bottom of the annular groove. The side of the sealing part away from the deformation part can fit against the end face of the PVC pipe fitting.

[0015] Furthermore, a first mark is provided on one side of the support ring, and a second mark is provided on one side of the connecting ring. When the blade is inserted into the PVC pipe fitting, the first mark and the second mark are positioned opposite each other.

[0016] The above settings facilitate control of the rotation angle of the connecting pipe, ensuring that the blade penetrates the outer surface of the PVC pipe fitting after the connecting pipe is rotated.

[0017] Furthermore, multiple slides are provided, evenly distributed along the circumference of the support ring, and each slide contains one of the aforementioned sliders.

[0018] The above settings improve the anti-detachment performance of PVC pipe fittings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the connection and fixing structure in an embodiment.

[0020] Figure 2 This is a cross-sectional view of the connection and fixing structure in an embodiment.

[0021] Figure 3 for Figure 2 Enlarged view of point A.

[0022] Figure 4 for Figure 2 BB cross-sectional view.

[0023] Figure 5 for Figure 4 Enlarged view of point C.

[0024] Figure 6 This is a schematic diagram showing the outer end of the slider positioned in the receiving groove. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] like Figures 1 to 6 A PVC pipe fitting connection and fixing structure includes a connecting pipe 3, a sealing strip 4, and a pipe clamping assembly 5. The connecting pipe 3 includes a connecting pipe body 31 and a positioning ring 32. The inner diameter of the connecting pipe body 31 is adapted to the outer diameter of the PVC pipe fitting 8. The positioning ring 32 is fixedly connected to the middle of the connecting pipe body 31 along the inner circumference. The inner diameter of the positioning ring 32 is the same as the inner diameter of the PVC pipe fitting 8. The positioning ring 32 has annular grooves 6 on opposite sides. The aforementioned sealing strip 4, which can cooperate with the end face of the PVC pipe fitting 8, is installed in the annular grooves 6.

[0027] Two sets of pipe clamping assemblies 5 are provided at both ends of the connecting pipe body 31. The pipe clamping assembly 5 includes a support ring 51, a slider 52 and a blade 53. The support ring 51 is coaxially installed at both ends of the connecting pipe body 31. A groove 7 is provided radially through the support ring 51. The slider 52 is disposed in the groove 7 and the blade 53 is fixedly connected to its inner end. The slider 52 slides inward so that the blade 53 is inserted into the outer surface of the PVC pipe fitting 8.

[0028] With the above settings, firstly, the inner surface of the positioning ring 32 can be flush with the inner surface of the PVC pipe fitting 8, which can reduce vibration and noise; secondly, after the blade 53 of the pipe clamping assembly 5 is inserted into the PVC pipe fitting 8, it can prevent the PVC pipe fitting 8 from being pulled out, eliminating the need for a plastic welding machine and making installation more convenient.

[0029] The inner diameters of the connecting pipe body 31 and the support ring 51 of this application are consistent with the outer diameter of the PVC pipe fitting 8. The thickness of the positioning ring 32 is consistent with the thickness of the PVC pipe fitting 8. The positioning ring 32 and the connecting pipe body 31 are integrally formed. Initially, the blade 53 is retracted in the groove 7. When installing the PVC pipe fitting 8, one end of the PVC pipe fitting 8 is inserted into the left end of the connecting pipe body 31 and abuts against the left side of the positioning ring 32. The other end of the PVC pipe fitting 8 is inserted into the right end of the connecting pipe body 31 and abuts against the right side of the positioning ring 32. The slider 52 is manually driven, and the slider 52 slides inward along the groove 7. The blade 53 penetrates the outer surface of the PVC pipe fitting 8, but does not penetrate all the way through. Specifically, the ratio of the depth of the blade 53 penetrating the PVC pipe fitting 8 to the thickness of the PVC pipe fitting 8 is between 10% and 20%. The blade 53 and the slider 52 act as a pin to prevent the PVC pipe fitting 8 from being pulled out. The entire installation process does not require a plastic welding machine, making it simpler and more efficient. Figure 3 The inner wall of the PVC pipe fitting 8 is flush with the inner wall of the positioning ring 32, allowing water to flow smoothly through the positioning ring 32 and reducing vibration and noise.

[0030] As one implementation, the connecting tube 3 also includes connecting rings 33 coaxially fixedly connected to both ends of the connecting tube body 31. The support ring 51 is rotatably connected to the inner side of the connecting ring 33. The inner side of the connecting ring 33 is provided with a receiving groove 331 that can accommodate the outer end of the slider 52. When the outer end of the slider 52 is placed in the receiving groove 331, the blade 53 is retracted in the slide groove 7. The outer end of the slider 52 is provided with a first inclined surface 521. When the connecting tube body 31 is rotated, the first inclined surface 521 is squeezed by the inner wall of the connecting ring 33, driving the slider 52 to move inward.

[0031] With the above setup, rotating the connecting pipe body 31 allows the blade 53 to be inserted into the PVC pipe fitting 8, further simplifying the installation.

[0032] Initially, such as Figure 6 The outer end of the slider 52 is set in the receiving groove 331, and the blade 53 is retracted in the sliding groove 7, so that the PVC pipe fitting 8 can be smoothly inserted into the pipe clamping assembly 5 and the connecting pipe body 31. At this time, the inner end of the first inclined surface 521 is flush with the outer surface of the support ring 51, or located in the sliding groove 7. After the PVC pipe fitting 8 is inserted, the support ring 51 is kept stationary, and the connecting pipe body 31 is rotated, for example, by turning the connecting pipe body 31 counterclockwise. Figure 5 The inner wall of the connecting ring 33 presses against the first inclined surface 521, and the slider 52 drives the blade 53 to move inward, so that the blade 53 penetrates the outer surface of the PVC pipe fitting 8.

[0033] In one implementation, the side of the support ring 51 near the positioning ring 32 abuts against the end face of the connecting pipe body 31. A groove 332 is provided on the inner side of the connecting ring 33 along the circumferential direction. A clamp head 54 is fixedly connected on the outer side of the support ring 51 along the circumferential direction. The clamp head 54 is set in the groove 332, and the side of the clamp head 54 away from the positioning ring 32 abuts against the side wall of the groove 332.

[0034] The above configuration enables the support ring 51 to rotate stably at the end of the connecting pipe body 31.

[0035] Taking the pipe clamping assembly 5 at the left end of the connecting pipe body 31 as an example, as follows: Figure 3 The right side of the support ring 51 abuts against the left end of the connecting pipe body 31 to prevent the support ring 51 from moving to the right, and the left side of the clamp head 54 abuts against the left side wall of the clamp groove 332 to prevent the support ring 51 from moving to the left. That is, through the above settings, the clamping assembly 5 is axially fixed at both ends of the connecting pipe body 31, and the clamping assembly 5 and the connecting pipe body 31 can only rotate relative to each other. The clamping assembly 5 will not detach from the connecting pipe body 31.

[0036] As one implementation, the connecting ring 33 is made of plastic, and the outer periphery of the clamp 54 is provided with a second inclined surface 541 so that the support ring 51 can be inserted into the connecting ring 33. The side of the second inclined surface 541 near the positioning ring 32 is inclined inward and extends to the outer surface of the support ring 51.

[0037] The above configuration facilitates the insertion of the support ring 51 into the connecting ring 33.

[0038] The cross-section of the clamp head 54 in this application is a right-angled triangle, with the second inclined surface 541 corresponding to the hypotenuse. The side of the clamp head 54 away from the positioning ring 32 corresponds to the right-angled side perpendicular to the outer surface of the support ring 51. The angle between the second inclined surface 541 and the outer surface of the support ring 51 is less than 30°. In addition, the height of the clamp head 54 protruding from the outer surface of the support ring 51 is less than 2mm. When installing the clamp tube assembly 5, the slider 52 is first installed into the slide groove 7, and then the support ring 51 is pushed into the connecting ring 33. The connecting ring 33 is made of plastic and has good elasticity. During the process of pushing the support ring 51 in, the clamp head 54 can use the second inclined surface 541 to open the connecting ring 33 and then clamp into the clamp groove 332. After the clamp head 54 is clamped into the clamp groove 332, the connecting ring 33 returns to its original position.

[0039] As one implementation, the sealing strip 4 includes a sealing part 41 and a deformable part 42. Both the sealing part 41 and the deformable part 42 are annular structures. The width of the sealing part 41 is adapted to the width of the groove of the annular groove 6. Two deformable parts 42 are provided and are fixedly connected to the side of the sealing part 41 near the bottom of the groove of the annular groove 6. The two deformable parts 42 are bifurcated and abut against the bottom of the groove of the annular groove 6. The side of the sealing part 41 away from the deformable part 42 can be fitted with the end face of the PVC pipe fitting 8.

[0040] The sealing strip 4 of this application has a π-shaped cross section and is an integrally molded structure. The two deformation parts 42 are V-shaped. After the PVC pipe 8 is inserted, the side of the sealing part 41 away from the positioning ring 32 is circumferentially attached to the end face of the PVC pipe 8. The deformation part 42 deforms and is supported between the sealing part 41 and the annular groove 6, so that there is a good seal between the PVC pipe 8 and the positioning ring 32, preventing water leakage.

[0041] As one implementation, a first mark 9 is provided on one side of the support ring 51, and a second mark 10 is provided on one side of the connecting ring 33. When the blade 53 is inserted into the PVC pipe fitting 8, the first mark 9 and the second mark 10 are positioned opposite each other.

[0042] The above settings facilitate control of the rotation angle of the connecting pipe 3, ensuring that after the connecting pipe 3 rotates, the blade 53 penetrates the outer surface of the PVC pipe fitting 8.

[0043] As one implementation method, multiple slide grooves 7 are provided, evenly distributed around the support ring 51, and each slide groove 7 is provided with one of the aforementioned sliders 52.

[0044] The above settings enhance the anti-detachment performance of PVC pipe fittings 8.

[0045] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A PVC pipe fitting connection and fixing structure, characterized in that, The device includes a connecting pipe, a sealing strip, and a clamping assembly. The connecting pipe includes a connecting pipe body and a positioning ring. The inner diameter of the connecting pipe body is adapted to the outer diameter of the PVC pipe fitting. The positioning ring is fixedly connected to the middle of the connecting pipe body along its inner circumference. The inner diameter of the positioning ring is the same as the inner diameter of the PVC pipe fitting. The positioning ring has annular grooves on opposite sides, and the aforementioned sealing strips that can mate with the end face of the PVC pipe fitting are installed in the annular grooves. Two sets of the tube clamping assembly are provided at both ends of the connecting pipe body. The tube clamping assembly includes a support ring, a slider and a blade. The support ring is coaxially installed at both ends of the connecting pipe body. A groove is radially provided on the support ring. The slider is placed in the groove and the inner end is fixedly connected to the blade. The slider slides inward so that the blade penetrates the outer surface of the PVC pipe fitting.

2. The PVC pipe fitting connection and fixing structure according to claim 1, characterized in that, The connecting tube also includes connecting rings coaxially fixed to both ends of the connecting tube body. The support ring is rotatably connected to the inner side of the connecting ring. The inner side of the connecting ring is provided with a receiving groove that can accommodate the outer end of the slider. When the outer end of the slider is placed in the receiving groove, the blade is retracted in the groove. The outer end of the slider is provided with a first inclined surface. When the connecting tube body is rotated, the first inclined surface is squeezed by the inner wall of the connecting ring, driving the slider to move inward.

3. The PVC pipe fitting connection and fixing structure according to claim 2, characterized in that, The side of the support ring closest to the positioning ring abuts against the end face of the connecting pipe body. A groove is provided on the inner side of the connecting ring along the circumferential direction. A clamping head is fixedly connected on the outer side of the support ring along the circumferential direction. The clamping head is disposed in the groove, and the side of the clamping head away from the positioning ring abuts against the side wall of the groove.

4. The PVC pipe fitting connection and fixing structure according to claim 3, characterized in that, The connecting ring is made of plastic. The outer periphery of the clamp head is provided with a second inclined surface so that the support ring can be inserted into the connecting ring. The side of the second inclined surface near the positioning ring is inclined inward and extends to the outer surface of the support ring.

5. The PVC pipe fitting connection and fixing structure according to claim 1, characterized in that, The sealing strip includes a sealing part and a deformation part, both of which are annular structures. The width of the sealing part is adapted to the width of the annular groove. Two deformation parts are provided and fixedly connected to the side of the sealing part near the bottom of the annular groove. The two deformation parts fork and abut against the bottom of the annular groove. The side of the sealing part away from the deformation part can fit against the end face of the PVC pipe fitting.

6. The PVC pipe fitting connection and fixing structure according to claim 2, characterized in that, A first mark is provided on one side of the support ring, and a second mark is provided on one side of the connecting ring. When the blade is inserted into the PVC pipe fitting, the first mark and the second mark are positioned opposite each other.

7. The PVC pipe fitting connection and fixing structure according to claim 1, characterized in that, Multiple slides are provided and are evenly distributed along the circumference of the support ring, and each slide is provided with one of the aforementioned sliders.

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