CN102641616A - Filtering pipe and fluid pipeline using same - Google Patents

Abstract

The invention discloses a filter pipe and a fluid pipeline using the filter pipe. The fluid pipeline includes a front connecting pipe section and a rear connecting pipe section. A filter pipe is inserted in the rear connecting pipe section. The thrust clamping structure between them is clamped and fixed. The filter tube includes a tube body located in the rear pipe section. Filter through holes are distributed on the tube body. The front end of the pipe body is an open end, and the open end of the pipe body has an everted edge extended from the peripheral surface of the pipe body and fixed by the thrust clamping structure between the front and rear connecting pipe sections. It has a front side that presses and thrusts with the front thrust clamping surface and a rear side that presses and thrusts with the rear thrust clamping surface. The filter pipe of the present invention is arranged in the downstream pipe section of the fluid pipeline, and the overall installation size of the fluid pipeline does not change much, and is suitable for use in places with limited installation space.

Description

Filter tubes and fluid lines using such filter tubes

technical field

The invention belongs to the technical field of filter devices, and in particular relates to a filter tube and a fluid pipeline using the filter tube.

Background technique

After the existing hydraulic pipeline system is used for a long time, dirt such as sludge and rust will adhere to the pipe wall. During the movement of the equipment, the dirt in the hydraulic pipeline will break away from the pipe wall and mix into the fluid. As the fluid enters the control mechanism of the hydraulic pipeline system, it will affect the work of the hydraulic pipeline control mechanism. In this way, the fluid in the pipeline needs to be filtered. At present, the filter device connected in series on the fluid pipeline is often used to filter the fluid. However, the installation of this peripheral filter device will affect the installation size of the fluid pipeline, so it is not suitable for applications where the installation space is limited.

Contents of the invention

The purpose of the present invention is to provide a filter tube to solve the technical problem that the filter device in the prior art is not suitable for places with limited fluid pipeline installation space; meanwhile, the present invention also provides a fluid pipeline using the above filter tube.

In order to achieve the above object, the filter tube provided by the present invention adopts the following technical scheme: the filter tube includes a tube body extending along the front and rear directions, the tube body is distributed with filtering through holes, and the rear end of the tube body is provided with a sealing end cap, Filtration through holes are distributed on the sealing end cap, the front end of the tube body is an open end, and the open end of the tube body has an everted edge extending outward from the peripheral surface of the tube body.

The valgus edge is a tapered structure extending forward or backward along the axial direction of the pipe body.

The fluid pipeline provided by the present invention adopts the following technical scheme: the fluid pipeline includes a front connecting pipe section and a rear connecting pipe section which are arranged along the front and rear directions and are butted and assembled together, and the front and rear connecting pipe sections are pushed through the middle between the two The connection structure is fixedly assembled, and a filter tube is inserted in the rear connection section. The filter tube is clamped and fixed by the thrust clamping structure between the front and rear connection sections. The thrust clamping structure includes a front The thrust clamping surface and the rear thrust clamping surface located on the rear connecting pipe section, the filter pipe includes a pipe body extending in the front and rear direction and located in the rear connecting pipe section, and filter through holes are distributed on the pipe body. The rear end is provided with a sealing end cover, and filter through holes are distributed on the sealing end cover. The push clamping structure clamps the fixed valgus edge, and the valgus edge has a front side that presses and thrusts with the front thrust clamping surface and a rear side that presses and thrusts with the rear thrust clamping surface. side.

The intermediate push connection structure includes a joint nut extending axially along the front and rear directions, the inner hole of the joint nut is a stepped hole, the large diameter section of the stepped hole is provided with an internal thread section, and one of the front connecting pipe section and the rear connecting pipe section The outer peripheral surface of one is provided with an external thread that is helically matched with the internal thread section of the joint nut, and the other is provided with a pressing flange that is pushed and matched with the stepped surface of the stepped hole of the joint nut on the outer peripheral surface. The pressing flange is arranged at the rear end of the front connecting pipe section or at the end position of the front end of the rear connecting pipe section, and the side of the pressing flange facing the valgus edge is the front thrust on the front connecting pipe section. Clamping surface or rear thrust clamping surface on the rear connection section.

The front connecting pipe section or the rear connecting pipe section protrudingly provided with the pressing flange is fitted with a pushing guide sleeve, and the pushing guiding sleeve has a step surface fitted between the pressing flange and the joint nut. The pushing flange, the pushing flange pushes and fits with the stepped surface in the joint nut through the pushing flange.

The front connecting pipe section and/or the rear connecting pipe section are composed of a pipe body and a joint body fixedly connected to one end of the pipe body facing the filter pipe. The fluid through hole connected to the inner cavity, the end of the joint body facing the filter tube pushes the top pressure end on the everted edge of the filter tube, and the top pressure end surface of the top pressure end of the joint body is the above-mentioned front The front thrust clamping surface on the connecting pipe section or the rear thrust clamping surface on the rear connecting pipe section.

The joint body is spirally mated with the pipe body, and a limiting flange is protruded on the outer peripheral surface of the joint body to cooperate with the thrust limit of the pipe body.

The valgus edge is a conical structure extending forward or backward along the axial direction of the pipe body, and the front thrust clamping surface of the front connecting pipe section is a conical surface matched with the valgus edge. The rear thrust clamping surface of the rear connecting pipe section is a tapered surface matched with the everted edge.

The beneficial effects of the present invention are: when the filter tube provided by the present invention is applied to a fluid pipeline, the filter tube is inserted into the rear connecting pipe section along the flow direction of the fluid, and the open end of the tube body is located upstream, so that the front and rear When the fluid in the connection section flows through the filter tube, it is filtered by the filter tube to eliminate impurities in the fluid and avoid the influence of impurities in the fluid on the pipeline control mechanism. During specific installation, the filter tube is clamped and fixed in the fluid pipeline by the thrust clamping structure between the front and rear connecting pipe sections. The filter pipe provided by the present invention is located in the connecting pipe section when in use, occupies less installation space, and is especially suitable for the places where the installation space of the fluid pipeline is limited and the fluid in the fluid pipeline needs to be filtered.

The fluid pipeline provided by the present invention includes a front connecting pipe section, a rear connecting pipe section and a filter pipe. The front and rear connecting pipe sections are fixedly connected by an intermediate pushing connection structure, and the filter pipe is held by a thrust clamping structure between the front and rear connecting pipe sections. The clamp is secured in the fluid line. The front and back direction of the fluid pipeline provided by the present invention is based on the fluid flow direction in the fluid pipeline, and the filter tube is inserted in the connecting pipe section, and the open end of the tube body is located upstream, so that the fluid flows through the filter tube by The filter tube filters it, eliminates impurities in the fluid, and avoids the influence of impurities in the fluid on the pipeline control mechanism. The filter tube of the present invention is set as a filter device in the downstream pipe section of the fluid pipeline, so that the overall installation size of the fluid pipeline with the filter device does not change much, and is suitable for applications where the installation space is limited and the fluid needs to be filtered. place. The fluid pipeline provided by the invention has wide application range, simple structure and convenient installation, and the filter pipe in the connecting pipe section can be removed and cleaned repeatedly for utilization.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of filter tube provided by the present invention;

Fig. 2 is the structural representation of another angle of filter pipe shown in Fig. 1;

Fig. 3 is the structural representation of embodiment 2 of the filter tube provided by the present invention;

Fig. 4 is a structural schematic diagram of another angle of the filter tube shown in Fig. 3;

Fig. 5 is a schematic structural view of a fluid pipeline using a filter tube as shown in Fig. 1;

Figure 6 is an enlarged view of A in Figure 5;

Figure 7 is an enlarged view at B in Figure 5;

Fig. 8 is a structural schematic diagram of a fluid pipeline using a filter tube as shown in Fig. 3;

Fig. 9 is an enlarged view at C in Fig. 8;

Figure 10 is an enlarged view at D in Figure 8;

(The arrows in Figure 5 and Figure 8 indicate the direction of fluid flow in the fluid pipeline).

Detailed ways

Example 1:

As shown in Fig. 1 and Fig. 2, a kind of embodiment of filter pipe, the filter pipe in this embodiment comprises the pipe body 1 that extends along the front and rear direction, is distributed with filter through-hole on the pipe body, and the front end of pipe body 1 is The opening end and the rear end are sealing ends. The sealing end of the pipe body 1 is provided with a sealing end cover 3, and filter through holes are distributed on the sealing end cover 3. Turning edge 2, the side of the turning edge 2 away from the pipe body is the front side 21, and the side facing the pipe body is the rear side 22.

The eversion edge 2 of the filter tube in this embodiment is a tapered structure extending forward along the axial direction of the tube body. The taper of the eversion edge of the tapered structure is 74°. and the rear side are conical torus.

In this embodiment, the taper of the eversion edge is 74°. In other embodiments, the taper of the eversion edge can be selected from other angles according to actual applications.

Example 2:

As shown in FIG. 3 and FIG. 4 , the main difference from Embodiment 1 is that the eversion edge 4 of the filter tube is a tapered structure extending backward along the axial direction of the tube body.

The eversion edges in the above two embodiments both have a tapered structure, and in other embodiments, the eversion edges may also have a horizontal structure. Compared with the everted edge of the horizontal structure and the everted edge of the conical structure, the everted edge of the conical structure has a better top pressure sealing effect with the front and rear connecting pipe sections, and realizes rigid sealing.

In the specific production of the filter tube in the above two embodiments, the tube body can adopt a stainless steel etching plate with a thickness of 0.3mm, and leave a non-porous area of 0.5-1mm around the etching plate, and laser weld the edge after the etching plate is rolled round Butt seam position. The material of the sealing end cap is a stainless steel etched plate with a thickness of 0.3mm, and a non-porous area of 2-3mm is left around, which is punched and formed, and then fixed on the pipe body by laser welding. As shown in Figure 2 and Figure 4, the end cover with the valgus edge is stamped with 0.3mm thick stainless steel or directly processed with a stainless steel rod. The end cover includes an axial section and an valgus edge located at one end of the axial section. The other end of the axial section is welded and fixed at the end of the pipe body. Because in use, the filter tube needs to be inserted into the rear connection section, in order to avoid affecting the normal flow velocity in the fluid pipeline, the tube wall of the filter tube should be thinner.

Example 3:

As shown in Fig. 5, Fig. 6 and Fig. 7, an embodiment of a fluid pipeline, the fluid pipeline in this embodiment includes a front connecting pipe section 10 and a rear connecting pipe section 15 which are arranged in the front and rear directions but assembled together, The front and back direction here is consistent with the fluid flow direction in the fluid pipeline. The front and rear connecting pipe sections are fixedly assembled through the intermediate pushing connection structure between the two, and a filter pipe 14 is inserted in the rear pipe section 15. The filter pipe 14 adopts the structure of the filter tube as shown in Figure 1, the valgus edge 140 of the filter tube 14 is a tapered structure extending forward along the axial direction of the tube body, and the front side and the rear side of the valgus edge 140 are both tapered rings. On the surface, the filter pipe 14 is clamped and fixed by the thrust clamping structure between the front and rear connecting pipe sections. The matched front thrust clamping surface and the rear thrust clamping surface located on the rear connecting pipe section are pressed and thrust-fitted with the rear side of the everted edge. The intermediate pushing connection structure forces the front and rear connecting pipe sections to move towards each other to push against the front side and the rear side of the everted edge 140 of the filter tube 14 respectively.

The front connecting pipe section 10 in this embodiment consists of a pipe body and a joint body 11 fixedly connected to the rear end of the pipe body towards the filter pipe. The joint body 11 is screw-fitted with the pipe body. A limiting flange that cooperates with the thrust limiting of the pipeline body is provided on the surface. On the joint body 11, there is a fluid through hole extending axially along the front and rear direction and communicating with the inner cavity of the pipe body. The rear end of the joint body 11 towards the filter tube 14 is thrust against the rear end of the filter tube and acts on the valgus edge of the filter tube. The pressure end on the top, the pressure end surface of the joint body 11 is the front thrust clamping surface 110 on the front connecting pipe section that is in thrust pressure-tight seal fit with the front side of the valgus edge.

The intermediate push connection structure in this embodiment includes a joint nut 12 extending axially along the front-to-back direction. The inner hole of the joint nut 12 is a stepped hole, and the large diameter section of the stepped hole is provided with an internal thread section. The outer peripheral surface of the joint body 11 is provided with a spiral fit with the internal thread section of the joint nut, and a pressing flange is protruded on the outer peripheral surface of the rear connecting pipe section 15 to push and cooperate with the stepped surface of the stepped hole of the joint nut. 150, where the pressing flange 150 on the rear connecting pipe section 15 is set at the end position of the rear connecting pipe section towards the front end of the outward turning edge 140 of the filter pipe 14, the pressing flange 150 faces the The side of the everted edge of the filter tube 14 is the rear thrust clamping surface on the rear connecting pipe section 15 that presses and seals with the rear side of the everted edge.

In this embodiment, the pressing flange on the rear connecting pipe section 15 pushes and fits with the stepped surface of the stepped hole in the joint nut through the pushing guide sleeve 13 . The push-out guide sleeve 13 is set on the rear joint section 15, and the push-out guide sleeve 13 has a push-out flange fitted between the press flange of the rear joint section and the stepped surface of the stepped hole of the joint nut 130, the front and rear sides of the pushing flange 130 have front and rear pushing surfaces respectively for pushing and matching with the pressing flange 150 and the stepped hole of the joint nut 12, and the pushing flange 150 is pushed through The flange 130 pushes and fits with the stepped surface 120 in the stepped hole of the joint nut. When in use, tighten the joint nut, and the joint nut exerts a force on the joint body and the top derivation sleeve to force the two to move toward each other, so that the filter tube, the front joint section and the rear joint section can be fixedly assembled on the one hand, and on the other hand, also Ensure the top pressure seal of the front thrust clamping surface of the front connecting pipe section and the front side of the valgus edge and the top pressure sealing of the rear thrust clamping surface of the rear connecting pipe section and the rear side of the valgus edge, thus ensuring the front, Effective sealing at the butt joint of the rear connection section.

In addition, the valgus edge 140 of the filter tube in this embodiment has a tapered structure, and the front side and the rear side of the valgus edge are both tapered annular surfaces, so that the front thrust clamping surface of the front connecting pipe section is the joint body. The pressing end surface is a tapered surface matching the front side of the valgus edge, and the rear thrust clamping surface of the rear connecting pipe section is the part of the pressing flange of the rear connecting pipe section facing the valgus edge of the filter tube. The sides are tapered.

As shown in Figure 5, when in use, the fluid in the fluid pipeline flows from front to back, and when the fluid passes through the filter tube, it is filtered by the filter tube to eliminate impurities in the fluid and prevent impurities in the fluid from affecting the pipeline control mechanism. Influence.

Example 4:

As shown in Fig. 8, Fig. 9, Fig. 10, its difference from Embodiment 3 mainly lies in that: the filter pipe 24 is inserted in the connecting pipe section 20 composed of the pipeline body and the joint body 21, the filter pipe 24 The structure is consistent with the structure shown in Figure 3. The eversion of the filter tube 24 is a conical structure extending axially backward along the 240. At this time, the front end of the joint body 21 is the top pressure end, and the top pressure of the joint body The end surface 210 of the end is a tapered surface for press-fitting with the rear side of the valgus rim, and an external thread for screwing a joint nut is provided on the outer peripheral surface of the joint body 21 . The described push-in guide sleeve 23 for press-fitting with the stepped surface of the stepped hole of the joint nut 22 is set on the front connecting pipe section 25, and a pressing flange 250 is arranged at the rear end of the front connecting pipe section 25. When the joint nut 22 is used, the front and rear connecting pipe sections move towards each other until the end surface 210 of the pressure-pressing end of the joint body 21 is sealed and pressed against the back side of the everted edge 240 of the filter tube 24 and the pressure-pressing flange 250 of the front connecting pipe section 25 The rear side presses against the front side of the everted edge 240 of the filter tube, which not only realizes the fixation of the filter tube, but also realizes the sealing of the joint of the fluid pipeline.

Similarly, the eversion edges in the above two embodiments are all tapered structures, and in other embodiments, the eversion edges can also be horizontal structures. Compared with the valgus edge of the horizontal structure and the valgus edge of the conical structure, the valgus edge of the conical structure and the top pressure sealing effect of the front and rear connecting pipe sections are better, and an effective rigid seal is achieved.

In embodiment 3, the front connection section is composed of the pipe body and the joint body, while in embodiment 4, the rear connection section is composed of the pipe body and the joint body, and part of the filter tube is inserted into the fluid channel of the joint body middle. In other embodiments, the front and rear connecting pipe sections can be composed of a pipe body and a joint body at the same time, and the joint bodies are inserted into the pipe body in a screw-tight manner, and the end faces of the corresponding ends of the two joint bodies are respectively in contact with the valgus of the filter tube. The front side and the rear side of the edge are press fit, so as to realize the compression and fixation of the filter tube and the pressure sealing of the interface of the fluid pipeline. the

Claims (8)

1. screen pipe; It is characterized in that: comprise the body that extends along fore-and-aft direction; Be distributed with the filtration through hole on this body, the rear end of body is provided with seals end cap, and sealing end covers and is distributed with the filtration through hole; The body front end is an openend, and the openend of body has outside the body outer peripheral face is outward extending and turns edge.

2. screen pipe according to claim 1 is characterized in that: described outer turning edge is the pyramidal structure of axially extending forward or backward along body.

3. fluid circuit; It is characterized in that: comprise the preceding nozzle belt and the rear tube section that are assembled together along the butt joint of fore-and-aft direction layout; Forward and backward nozzle belt is fitted with screen pipe through being positioned at the fixing assembling of middle pushing tow syndeton between the two in the rear tube section, this screen pipe is gripped by the thrust clamp structure between the forward and backward nozzle belt; The thrust clamp structure comprise be positioned at before on the nozzle belt preceding thrust clamping face be positioned at the back thrust clamping face on the rear tube section; Said screen pipe comprises the body that is arranged in the rear tube section that extends along fore-and-aft direction, is distributed with the filtration through hole on the body, and the rear end of body is provided with seals end cap; Sealing end covers and is distributed with the filtration through hole; The body front end is an openend, and the openend of body has outer the turning edge that grips from the thrust clamp structure by between the said forward and backward nozzle belt of body periphery facing epitaxy, turns edge outward to have leading flank that cooperates with said preceding thrust clamping face roof pressure thrust and the trailing flank that cooperates with the thrust of said back thrust clamping face roof pressure.

4. fluid circuit according to claim 3; It is characterized in that: the pushing tow syndeton comprises the axial collar nut that extends along fore-and-aft direction in the middle of described; The endoporus of collar nut is a shoulder hole; The big footpath section of shoulder hole is provided with internal thread segment; Before one of them outer peripheral face of nozzle belt and rear tube section be provided with the external screw thread of the internal thread segment screw fit of collar nut, another outer peripheral face on convex with the roof pressure flange that cooperates with the cascaded surface pushing tow of the shoulder hole of said collar nut; The end position place of the front end of rear end or the rear tube section of nozzle belt before this roof pressure flange is arranged on, the side that towards said outside, turns edge of roof pressure flange are and describedly are positioned at the preceding thrust clamping face on the preceding nozzle belt or are positioned at the back thrust clamping face on the rear tube section.

5. fluid circuit according to claim 4; It is characterized in that: be set with the pushing tow guide pin bushing on described preceding nozzle belt that convexes with the roof pressure flange or the rear tube section; Have the pushing tow flange between the cascaded surface that is assemblied in said roof pressure flange and the said collar nut on this pushing tow guide pin bushing, described roof pressure flange cooperates with cascaded surface pushing tow in the said collar nut through the pushing tow flange.

6. fluid circuit according to claim 3; It is characterized in that: nozzle belt and/or rear tube section are made up of pipeline body and the fittings body towards an end of said screen pipe that is connected in pipeline body before described; Offer the axial fluid through-hole that is communicated with the inner chamber of pipeline body that extends along fore-and-aft direction on the fittings body; Fittings body press the roof pressure end on outer the turning edge act on screen pipe towards ejection till the end of screen pipe, the roof pressure end face of the roof pressure end of fittings body is preceding thrust clamping face or the described back thrust clamping face that is positioned on the rear tube section on the nozzle belt before described being positioned at.

7. fluid circuit according to claim 6 is characterized in that: described fittings body and the inserting of pipeline body spiral convex with and the spacing defining flange that cooperates of pipeline body thrust at the outer peripheral face of fittings body.

8. according to any described fluid circuit in the claim 3 to 7; It is characterized in that: described outer turning edge is the pyramidal structure of axially extending forward or backward along body; The preceding thrust clamping face of nozzle belt is and the said outer taper surface that turns edge and match before said, and the back thrust clamping face of said rear tube section is and the said outer taper surface that turns edge and match.

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