Clamp for butt joint of pipe sets, pipe sets, electric heating device and heat pump system

Abstract

The utility model relates to the technical field of pipeline assembly, and discloses a clamp for pipe group butt joint, which comprises a clamping piece body, the clamping piece body is provided with two clamping arms arranged in a U shape, and each clamping arm is provided with a clamping groove; wherein the two clamping arms can expand outwards in an elastic deformation mode and rebound to recover, at least part of the two butt joint ends can be contained in the U-shaped space of the clamping piece body in the external expansion state, and the two outer page edges are clamped in the clamping groove after rebound recovery. According to the clamp disclosed by the embodiment of the utility model, the butt joint end of the pipe group is peripherally limited through the two clamping arms, and meanwhile, the clamping groove is used for axially limiting and preventing separation of the pipeline; in addition, the clamp achieves clamping and clamping releasing operation in an elastic deformation mode, operation is fast, simple and convenient, and disassembly and assembly of the pipe sets are facilitated. The invention further discloses a pipe set, an electric heating device and a heat pump system.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline assembly, for example, to a clamp for pipe group docking, a pipe group, an electric heating device and a heat pump system. Background Art

[0002] In the current situation where energy supply is tightening and environmental protection requirements are gradually increasing, air source heat pump air conditioning systems have received more attention. The main working principle of the air source heat pump system is to use the external heat collection unit to absorb heat from the ambient atmosphere and vaporize it, compress it through the compressor to increase the temperature, and turn it into high-temperature and high-pressure gas, and then exchange heat with the water to be heated through the intermediate heat exchange unit. The heated high-temperature water is then transported to the heating terminal equipment. In this way, continuous water heating is achieved through the continuous circulation of the working fluid, and heat is continuously transported to the indoor side. Its energy efficiency ratio (COP value) can be as high as 2.0 to 5.0. In this way, due to its advantages such as environmental protection and efficient energy supply, it has been rapidly applied to civil and commercial fields, and has achieved good results.

[0003] However, in actual use, it is found that under extreme low temperature conditions such as severe winter weather, the air source heat pump system often cannot provide enough heat due to the large difference between the outdoor ambient temperature and the temperature required by the heating terminal equipment, resulting in limited heating effect. In response to the above situation, some heat pump systems are equipped with auxiliary electric heating devices. When the air source heat pump system cannot meet the heating demand, the auxiliary electric heating device will automatically start, convert electrical energy into heat energy and transfer it to the water to be heated, so as to ensure the heat supply and heating stability of the heat pump system.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] The auxiliary electric heating device of the air source heat pump system needs to be connected to the water circuit during the assembly of the whole machine. In the related art, the auxiliary electric heating device is connected to the water circuit mainly through threaded connection and welding. However, the threaded connection requires a large space to ensure the twisting operation, while the welding method will limit the disassembly and assembly of the pipeline during subsequent maintenance and replacement. It can be seen that the existing methods of realizing pipeline installation and connection have certain disadvantages and are not convenient for disassembly and assembly.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a clamp for pipe group docking, a pipe group, an electric heating device and a heat pump system to solve the technical problem of inconvenient assembly and disassembly of pipeline group docking in the related art.

[0009] According to an embodiment of the first aspect of the present application, a clamp for butt jointing of a pipe group is provided, wherein two butt joint ends of the pipe group are respectively provided with annular outer edges and are in contact with each other;

[0010] The clamp comprises a clamp body, the clamp body has two clamp arms arranged in a U shape and each clamp arm is provided with a clamp groove;

[0011] The two clamp arms can be elastically deformed to expand and rebound, and in the expanded state, the two butt ends can be at least partially accommodated in the U-shaped space of the clamp body, and after rebounding, the two outer edges can be clamped in the clamping groove.

[0012] In some optional embodiments, the clamping groove extends in the longitudinal direction of the corresponding clamping arm and is formed through the clamping arm in the thickness direction;

[0013] The two outer edges at least partially extend into the clamping groove to limit the two butt ends from disengaging in the axial direction in the opposite direction.

[0014] In some optional embodiments, the groove width of the clamping groove along the axial direction of the tube group is greater than or equal to the sum of the axial thicknesses of the two outer edges, so that the clamping groove and the two outer edges form a clearance fit or a transition fit.

[0015] In some optional embodiments, the clamp arm has an arc-shaped arc segment, and the clamp groove is at least opened in the arc segment;

[0016] Furthermore, the curvature of the arc-shaped segment is adapted to the curvature of the tube group, so that the inner side surface of the arc-shaped segment at least partially fits the outer tube wall of the tube group.

[0017] In some optional embodiments, the arc segment and the tube group satisfy the following relationship:

[0018] L1≤R2,

[0019] Wherein, L1 is the distance between the arc segment and the axis of the tube group in the non-elastic deformation state, and R2 is the outer tube wall radius of the tube group;

[0020] Wherein, when the above relationship is satisfied and the clamping body clamps the tube set, the clamping body is in a non-elastic deformation state or a rebound tightening state.

[0021] In some optional embodiments, the clamp arm further has a flared section located at the free end of the clamp arm, and the flared section is formed to extend obliquely outward so that the U-shaped opening of the clamp body gradually expands outward.

[0022] According to an embodiment of the second aspect of the present application, a tube set is provided, characterized in that it includes:

[0023] A first pipeline having a first butt end, wherein the first butt end is provided with a first annular outer edge;

[0024] A second pipeline having a second butt end, wherein the second butt end is provided with a second annular outer edge;

[0025] For example, in the clamp for pipe group docking in any one of the embodiments of the first aspect, the clamp can clamp the first outer page edge and the second outer page edge in the clamping groove.

[0026] In some optional embodiments, the first butt end is formed with a first stirrup along its circumferential outward protrusion; the first outer leaf is outer-mounted on the first butt end and is located on a side of the first stirrup away from the second butt end;

[0027] And / or, the second butt end is formed with a second stirrup along its circumferential outward protrusion; the second outer leaf is outerly disposed on the second butt end and is located on a side of the second stirrup away from the first butt end.

[0028] According to an embodiment of the third aspect of the present application, there is provided an electric heating device, comprising:

[0029] The electric heating body comprises a heating tube cavity and a liquid inlet end tube and a liquid outlet end tube connected to the heating tube cavity, wherein the liquid inlet end tube is connected to a first external pipeline to input a working medium to be heated, and the liquid outlet end tube is connected to a second external pipeline to output a heated working medium;

[0030] As in the clamp for connecting the tube groups in any one of the embodiments of the first aspect above, the clamp is used to clamp the liquid inlet end tube and the first external pipeline, and / or to clamp the liquid outlet end tube and the second external pipeline.

[0031] According to an embodiment of a fourth aspect of the present application, a heat pump system is provided, comprising:

[0032] The tube assembly as in any one of the embodiments of the second aspect above;

[0033] And / or, an electric heating device as in the embodiment of the third aspect above.

[0034] The clamp for pipe group docking, pipe group, electric heating device and heat pump device provided by the embodiments of the present disclosure can achieve the following technical effects:

[0035] The clamp provided in the embodiment of the present disclosure can wrap the butt end of the pipe group in its U-shaped space through two clamp arms to achieve circumferential limit of the butt end of the pipe group; at the same time, the clamp grooves provided by the clamp arms are used to clamp the outer edge of the butt end, which can play the role of axial limit and anti-detachment of the pipeline, effectively ensuring the tightness of the connection between the two butt ends of the pipe group. In addition, the clamp can realize clamping and unclamping operations in a way of elastic deformation, which is quick and easy to operate and convenient for disassembly and assembly of the pipe group.

[0036] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0038] Figure 1a is a structural schematic diagram of a clamp provided in an embodiment of the present disclosure (viewing angle 1);

[0039] Figure 1b is a structural schematic diagram of a clamp provided in an embodiment of the present disclosure (viewing angle 2);

[0040] Figure 1c is a schematic top view of a clamp provided in one embodiment of the present disclosure;

[0041] Figure 2 is a structural schematic diagram of a pipe group provided in one embodiment of the present disclosure;

[0042] Figure 2a is a cross-sectional schematic diagram of a tube group provided by an embodiment of the present disclosure;

[0043] Figure 2b yes Figure 2a A partial enlarged view of part A;

[0044] Figure 3a is a schematic diagram of assembling a clamp and a pipe set provided in one embodiment of the present disclosure;

[0045] Figure 3b is an exploded view of the assembly of a clamp and a pipe group provided in one embodiment of the present disclosure;

[0046] Figure 3c is a schematic diagram of assembling a clamp and a pipe set provided in one embodiment of the present disclosure;

[0047] Figure 4 is a schematic diagram of the overall structure of an electric heating device provided by an embodiment of the present disclosure;

[0048] Figure 5Schematic diagram of a heat pump system provided in one embodiment of the present disclosure.

[0049] Reference numerals:

[0050] 1. Clamp; 10. Clip body;

[0051] 110, first clamping arm; 111, first arc-shaped section; 112, first flared section; 113, first clamping groove;

[0052] 120, second clamping arm; 121, first arc-shaped section; 122, second flared section; 123, second clamping groove;

[0053] 130, articulation arm;

[0054] 20. first pipeline; 21. first docking end; 22. first outer page edge;

[0055] 30. second pipeline; 31. second butt end; 32. second outer edge; 33. second stirrup; 34. limiting rib; 35. sealing ring;

[0056] 40. Electric heating device; 41. Electric heating body; 421. Liquid inlet pipe; 422. Liquid outlet pipe;

[0057] 51. a first external pipeline; 52. a second external pipeline;

[0058] 611. Outdoor heat exchanger; 612. Compressor; 621. Liquid pump; 622. Heating terminal equipment; 630. Intermediate heat exchanger. DETAILED DESCRIPTION

[0059] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0060] The terms "first", "second", etc. in the specification and claims of the embodiments of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present disclosure described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0061] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0062] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0063] The term "and / or" is a description of the association relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B.

[0064] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

[0065] The present application discloses a clamp 1, which can be used for the installation and matching of two pipelines in a pipe group, and can limit and fix the butt ends of the two pipelines in the circumferential and axial directions, so that the two butt ends can be assembled and connected more stably and tightly, and the disassembly and installation operations are relatively quick and easy to operate. Optionally, the pipe group form used in the embodiment of the present disclosure includes but is not limited to the connection of two single pipes, such as the butt assembly of two straight pipes, the butt assembly of a straight pipe and a bent pipe, etc., or the connection between the port of an independent device and its matching pipeline, such as the butt assembly of the port of an electric heating device 40 and a single pipe.

[0066] At the same time, the equipment type to which the above-mentioned pipe group belongs is not limited to the air source heat pump air conditioning system mentioned in the background technology. It should be understood that other equipment (systems) with a working fluid flow path can also apply the clamp 1 provided in this embodiment, and use the clamp 1 to achieve the docking assembly of the pipeline where the working fluid flow path is located, and therefore should also be covered within the protection scope of this application.

[0067] Combination Figure 1a to Figure 1cAs shown, the embodiment of the present disclosure provides a clamp 1 for pipe group docking, which at least includes a clamp body 10. The clamp body 10 has two clamp arms arranged in a U shape, and the U-shaped space of the clamp arm can be used to accommodate the two pipe docking ends by partially covering or fully covering the outer peripheral side of the docking end. In addition, a clamp groove is provided on the clamp arm, and the outer edges of the two docking ends are placed together in the clamp groove when the two are in a fitted state, and the clamp groove can limit the reverse movement of each outer edge along the axial direction of the pipeline.

[0068] Here, the clamp 1 provided in the embodiment of the present disclosure can wrap the butt end of the pipe group in its U-shaped space through two clamp arms to achieve circumferential limitation of the butt end of the pipe group; at the same time, the outer edge of the butt end is clamped by the clamp grooves provided by the clamp arms, which can play the role of axial limitation and anti-detachment of the pipeline, and effectively ensure the tightness of the connection between the two butt ends of the pipe group. In addition, the clamp 1 can realize clamping and unclamping operations in a way of elastic deformation, which is quick and easy to operate and convenient for disassembly and assembly of the pipe group.

[0069] In order to better illustrate the clamping method of the clamp 1 of the present application, one type of tube group to which the clamp 1 is applied is first exemplarily described here.

[0070] Combination Figure 2 to Figure 2b As shown, taking the form of a pipe group consisting of two single pipes as an example, the pipe group includes a first pipe 20 and a second pipe 30. The first pipe 20 has a first butt end 21, and the second pipe 30 has a second butt end 31. The first pipe 20 and the second pipe 30 are realized by the first butt end 21 and the second butt end 31, and a flow path for the working medium to flow from the first pipe 20 to the second pipe 30 or from the second pipe 30 to the first pipe 20 can be constructed.

[0071] Optionally, the first butt end 21 and the second butt end 31 are assembled by sleeve connection, such as Figure 2a Here, the inner diameter of the first butt end 21 is slightly larger than the outer diameter of the second butt end 31, so that the second butt end 31 can extend into the interior of the second butt end 31 along the axial direction. In the embodiment, the first butt end 21 is formed by expanding the main pipe section of the first pipeline 20, and the pipe diameter of the first butt end 21 is larger than the pipe diameter of the main pipe section of the first pipeline 20. A step surface is formed at the connection position between the two, and the step surface can abut against the end of the second butt end 31 to form a stopper for the extended second butt end 31 in the axial direction, thereby being able to limit the maximum sleeve depth of the second butt end 31.

[0072] Alternatively, the first butt joint end 21 and the second butt joint end 31 are assembled by abutting against each other. Specifically, in this embodiment, the outer end face of the first butt joint end 21 is defined as the first end face, and the outer end face of the second butt joint end 31 is defined as the second end face; when the first butt joint end 21 and the second butt joint end 31 are butt-jointed, the first end face and the second end face are flush with each other and are coaxially arranged.

[0073] In this embodiment, the first butt end 21 and the second butt end 31 are axially limited by the outer edge and the clamp 1. Optionally, the outer edge and the first butt end 21 (the second butt end 31) are an integrated structure or a split structure.

[0074] Specifically, for the form in which the outer page edge and the butt end are an integrated structure, here the first butt end 21 is taken as an example. Figure 2a As shown, the outer edge is an annular sheet structure located at the first end surface of the first butt end 21 and extending radially outward. The use of an integrated structure can improve the connection strength between the outer edge and the butt end, reduce the number of gaps, and thus reduce the occurrence of gap leakage problems.

[0075] And, for the form in which the outer page edge and the butt end are split structures, here the second butt end 31 is taken as an example, such as Figure 2 and 2a As shown, the outer edge is a separate annular sheet with a circular through hole inside. The second butt end 31 can be inserted into the outer edge through the circular through hole, that is, the outer edge is sleeved on the outside of the second butt end 31. The split structure can effectively reduce the difficulty of parts processing and simplify the process flow, so that the second butt end 31 and the outer edge can be processed and formed separately before assembly. In this embodiment, the outer edge is set at the junction of the protruding part and the non-protruding part of the second butt end 31.

[0076] In addition, in some optional embodiments, the outer tube wall of the second butt end 31 is further provided with stirrups, where the stirrups and the second butt end 31 are an integral structure, and in this embodiment, the outer tube and the stirrups cooperate to limit the movement of the second butt end 31. Specifically, Figure 2b As shown, the stirrup is formed by protruding outward from the outer tube wall of the second butt end 31 and extending around the circumference of the outer tube wall. Here, the outer diameter of the stirrup is larger than the inner diameter of the circular through hole of the outer edge, so that the stirrup and the outer edge can form a stop in the axial direction. At the same time, the outer edge is arranged on the side of the stirrup away from the first butt end 21, which can be used to prevent the stirrup (and the second butt end 31) from moving axially away from the first butt end 21, so as to ensure that the second butt end 31 and the first butt end 21 can always maintain a butt-fit state.

[0077] Thus, in addition to the form in which the first butt end 21 and the outer edge are integrated and the second butt end 31 and the outer edge are separated in the above embodiment, it is also possible that the first butt end 21, the second butt end 31 and the corresponding outer edge are all integrated, or the first butt end 21, the second butt end 31 and the corresponding outer edge are all separated. Those skilled in the art can make the selection according to actual needs, and the present application does not limit this.

[0078] Based on the pipe group form disclosed in the above example, combined with Figures 1a to 1c As shown, the two clamping arms of the clip body 10 in this embodiment are arranged in an approximately U-shape, and can be specifically divided into a first clamping arm 110 and a second clamping arm 120. Here, the tail ends of the first clamping arm 110 and the second clamping arm 120 are connected, and the head ends are arranged at intervals. The first clamping arm 110 and the second clamping arm 120 together enclose a semi-enclosed U-shaped space, wherein the head end of each clamping arm is located on the opening side of the U-shaped space. During actual assembly, the butt end of the pipe group moves horizontally from the opening side into the U-shaped space and covers at least part of the outer peripheral side of the two butt ends of the pipe group. In this way, the U-shaped space can form a limit on the outer peripheral side of the two butt ends, and can limit the deviation of any butt end toward the outer peripheral side to a certain extent, thereby maintaining the precise alignment of the two.

[0079] Optional, combined Figures 1a to 1c As shown, taking the first clamp arm 110 as an example, the first clamp arm 110 is a long sheet structure. Optionally, the sheet shape of the first clamp arm 110 includes but is not limited to regular linear shapes such as straight line, arc line, broken line, or other irregular linear shapes. In addition, the U-shaped arrangement in the above embodiment is mainly used as an example to illustrate the semi-enclosed space form of the clamp body 10. Those skilled in the art can also adopt other arrangements similar to the U-shape under the technical concept of the present application, such as V-shape, Ω-shape, etc., which should also be covered within the protection scope of the present application.

[0080] Alternatively, the first clamp arm 110 and the second clamp arm 120 are connected via a connecting arm 130. Here, the tail end of the first clamp arm 110 is connected to one end of the connecting arm 130, and the tail end of the second clamp arm 120 is connected to the other end of the connecting arm 130. In the figure, the connecting arm 130 is located at the bottom of the U-shaped space. The connecting arm 130 can increase the distance between the tail ends, thereby expanding the range of the U-shaped bottom space, so as to adapt to the assembly of the butt ends of larger-sized pipe groups.

[0081] Optionally, the first clamp arm 110 and the second clamp arm 120 are an integrated structure, which is made from the same metal strip through bending, stamping and other processes.

[0082] In the embodiment, when the clamp 1 is assembled with the tube set, one side wall of the clamp arm faces the tube set and abuts against the tube set, while the other side wall faces away from the tube set, thereby increasing the contact area between the clamp arm and the tube set and ensuring that the butt end of the tube set can be accommodated in the clamp groove of the clamp arm along the thickness direction of the clamp arm. Figure 3a and 3b As shown, the longitudinal direction of the clamp arm is perpendicular to the axial direction of the tube group, the transverse direction of the clamp arm is parallel to the axial direction of the tube group, and the thickness direction of the clamp arm is parallel to the radial direction of the tube group.

[0083] In some optional embodiments, the clamp arm has an arc-shaped arc segment, and the curvature of the arc segment is adapted to the curvature of the tube group, so that the inner side of the arc segment at least partially fits the outer tube wall of the tube group. In this way, the contact area between the inner side of the clamp arm and the outer tube wall of the tube group can be increased, so that the friction resistance between the two and the elastic force of the clamp body 10 itself can be used to ensure that the clamp body 10 can be tightly matched with the tube group (butt end), thereby reducing the occurrence of the clamp body 10 being separated from the tube group.

[0084] Here, the arc section of the first clamp arm 110 is defined as the first arc section 111, and the arc section of the second clamp arm 120 is defined as the second arc section 121. Figures 1a to 1c shown.

[0085] In this embodiment, the inner side of the clamp arm is in contact with the outer tube wall of the butt end of the tube group, so the curvature of the arc segment is determined according to the corresponding outer tube wall of the butt end. Optionally, the circumferential curvature of the arc segment in contact with the outer tube wall of the tube group ranges from π / 6 to π. In the figure, the curvature of the arc segment of the first clamp arm 110 and the first clamp arm 110 is the same, and the curvature of the arc segment in this embodiment is 2π / 3.

[0086] In some other optional embodiments, the clamp arm has a flared section located at the free end (head end) of the clamp arm, and the flared section is extended obliquely outward to make the U-shaped opening of the clip body 10 gradually expand outward.

[0087] Here, the flared section of the first clamp arm 110 is defined as the first flared section 112, and the flared section of the second clamp arm 120 is defined as the second flared section 112. Figures 1a to 1c shown.

[0088] Here, by setting the free end of the clamp arm in the above-mentioned expanded form, the size of the opening side of the U-shaped opening can be increased, so that when the clamp 1 and the tube set are assembled, the tube set can be relatively moved into the U-shaped space more smoothly. In addition, the distance between the expanded sections of the two clamp arms is large and extends outward, which is also more convenient for the user to hold and operate.

[0089] In some optional embodiments, the first clamping arm 110 is provided with a first clamping groove 113, and the second clamping arm 120 is provided with a second clamping groove 123. Figures 1a to 1c The clamping groove of each clamping arm extends longitudinally along the clamping arm and penetrates along the thickness direction of the clamping arm. Figure 1a and 1b As shown. During actual assembly, the outer edges of the two butt ends at least partially extend into the clamping groove. Here, the two groove edges of the clamping groove extending along the longitudinal direction of the clamping arm are perpendicular to the axial direction of the tube group, so that each outer edge forms a stopper match with the groove edge of the corresponding side clamping groove in the axial direction, thereby limiting the two butt ends from disengaging in the reverse direction in the axial direction, so that the two butt ends can maintain the butt-matching state.

[0090] In an embodiment, the clamping groove is at least formed in the arc-shaped section of the clamping arm. Figure 1a and 1b As shown, the outer edge of the tube group can at least be accommodated in the clamping groove corresponding to the arc section, and the inner side surface of the arc section can fit with the outer tube wall of the tube group, ensuring the tightness of the assembly of the clamp arm and the tube group.

[0091] And, if Figure 1a and 1b As shown, the clamping groove is also provided in the expanded section of the clamping arm and / or the clamping arm portion adjacent to the connecting arm 130. Here, the clamping groove is in the form of a continuous through groove, and the groove width is equal along the longitudinal direction of the clamping groove. Thus, the longitudinal length of the clamping groove can be effectively extended, so that it can adapt to pipes of various sizes, thereby improving the versatility of the clamp 1.

[0092] In some other embodiments not shown in the drawings, unlike the through-type clip grooves in the previous text, the clip grooves of each clip arm are in the form of grooves extending longitudinally along the clip arm and protruding outward along the thickness direction of the clip arm, and the grooves do not penetrate the wall surface of the clip arm. Compared with the clip grooves in the previous embodiments, the clip grooves in this embodiment can cover the matching gaps of the two outer edges, thereby achieving a certain sealing effect.

[0093] In the above embodiments, in order to better achieve the axial limiting effect of the clamping groove, the size relationship between the clamping groove and the outer edge is set to: the groove width of the clamping groove along the axial direction of the tube group is greater than or equal to the sum of the axial thicknesses of the two outer edges, that is, H ≥ h1 + h2. Figure 3c The clamping groove and the two outer edges form a clearance fit or transition fit, so that the lateral width of the clamping groove is prevented from being too large while ensuring that the two outer edges can be inserted into the clamping groove, so as to reduce the axial range of motion of the butt end (outer edge).

[0094] Based on the forms of the clip body 10 shown in the above embodiments, the clip body 10 is further made of a material with a certain elasticity, so that the two clamping arms of the clip body 10 can be elastically deformed under the action of external force, and can expand outward under the action of external force and rebound and recover under the action of its own elastic force.

[0095] Specifically, when the clamp 1 is assembled with the butt end of the pipe group, the two clamp arms can be expanded outward by external force, and the head ends of the two clamp arms move away from each other in the expanded state, so that the U-shaped opening is enlarged, and the pipe group can be conveniently moved horizontally into the U-shaped space through the U-shaped opening. And in this process, the two outer edges of the butt end are attached to each other and inserted into the corresponding clamp grooves of each clamp arm. Afterwards, the external force disappears, the clamp body 10 rebounds and recovers under its own elastic force, the head ends of the two clamp arms move toward each other, and the U-shaped opening is reduced to limit the pipe group in the U-shaped space, such as limiting the pipe group to the position of the two arc sections.

[0096] Similarly, when the clamp 1 and the tube set need to be disassembled, the above steps can be repeated, the difference being that when the clip body 10 is in the outwardly expanded state, the tube set is laterally moved out of the U-shaped space through the U-shaped opening.

[0097] In some optional embodiments, the arc segment and the tube group satisfy the following relationship:

[0098] L1≤R2,

[0099] Wherein, L1 is the distance between the arc segment and the axis of the tube group in the non-elastic deformation state, and R2 is the outer tube wall radius of the tube group;

[0100] Among them, when the above relationship is satisfied and the clamp body 10 clamps the tube group, the clamp body 10 is in a non-elastic deformation state or a rebound tightening state; among them, when L1=R2, the clamp body 10 is in a non-elastic deformation state; and when L<R2, the clamp body 10 is in a rebound tightening state, which can make the clamp arm more closely attached to the outer tube wall of the butt end.

[0101] In some optional embodiments, the present application further provides a pipe set, which includes a first pipe 20, a second pipe 30 and a clamp 1, such as Figures 3a to 3c As shown. The first pipeline 20 has a first butt end 21, and the first butt end 21 is provided with a first annular outer edge 22; and the second pipeline 30 has a second butt end 31, and the second butt end 31 is provided with a second annular outer edge 32. The clamp 1 is any of the clamps 1 shown in the above embodiments, and the first outer edge 22 and the second outer edge 32 can be clamped in the clamping groove by the clamp 1, so as to achieve the butt fixation of the first pipeline 20 and the second pipeline 30.

[0102] In some other embodiments, the first butt end 21 is formed with a first hoop convexly along its circumferential direction, and the first outer edge 22 is sleeved on the first butt end 21 and is located on the side of the first hoop far away from the second butt end 31, so that the cooperation between the first hoop and the first outer edge 22 can be used to form a stopper for the axial reverse movement of the first butt end 21. Similarly, the second butt end 31 is formed with a second hoop 33 convexly along its circumferential direction, and the second outer edge 32 is sleeved on the second butt end 31 and is located on the side of the second hoop 33 far away from the first butt end 21, so that the cooperation between the second hoop 33 and the second outer edge 32 can be used to form a stopper for the axial reverse movement of the second butt end 31.

[0103] Here, the specific structural design of the first pipeline 20 and the second pipeline 30 can refer to the above embodiments and will not be described in detail here.

[0104] In addition, combined Figure 2b As shown, in order to reduce the occurrence of liquid leakage, a sealing ring 35 is further provided between the adjacent tube walls of the first butt end 21 and the second butt end 31. The sealing ring 35 can be used to seal the gap between the first butt end 21 and the second butt end 31 to prevent the working fluid from flowing out of the gap or to prevent external air from flowing into the gap.

[0105] Optionally, the sealing ring 35 is sleeved on the outer tube wall of the second butt end 31. Here, a limiting rib 34 is also convexly formed on the outer tube wall of the second butt end 31, and the limiting rib 34 is formed by extending along the circumference of the outer tube wall; Figure 2b In the embodiment, the limiting rib 34 is located at one side of the second hoop 33 facing the first butt end 21, and the limiting rib 34 and the second hoop 33 are arranged at intervals, so that a sealing groove for accommodating the sealing ring 35 can be formed between the limiting rib 34 and the second hoop 33. The limiting rib 34 and the second hoop 33 can form stops on both sides of the axial direction of the sealing ring 35, respectively, so as to prevent the sealing ring 35 from falling out of the sealing groove.

[0106] In some other optional embodiments, the present application also provides an electric heating device 40, which can be used to heat the working medium flowing through it. Specifically, the electric heating device 40 includes an electric heating body 41 and a clamp 1 as shown in the above embodiment, and the clamp 1 can be used to achieve the connection between the electric heating body 41 and the external pipeline.

[0107] Combination Figure 4 As shown, the electric heating body 41 includes a heating tube cavity and a liquid inlet end tube 421 and a liquid outlet end tube 422 connected to the heating tube cavity. The liquid inlet end tube 421 is connected to the first external pipeline 51 to input the working medium to be heated, and the liquid outlet end tube 422 is connected to the second external pipeline 52 to output the heated working medium.

[0108] In an embodiment, the clamp 1 can be used to clamp the liquid inlet end tube 421 and the first external pipeline 51, and / or, to clamp the liquid outlet end tube 422 and the second external pipeline 52. Figure 4 The above-mentioned clamp 1 is respectively provided on the liquid inlet end tube 421 and the liquid outlet end tube 422 of the electric heating device 40.

[0109] In some further optional embodiments, the present application further provides a heat pump system, which includes a pipe group as in the above embodiment, and / or an electric heating device 40 as in the above embodiment.

[0110] For example, Figure 5 As shown, the heat pump system includes components such as an outdoor heat exchanger 611, a compressor 612, an intermediate heat exchanger 630, an electric heating device 40 and a liquid pump 621.

[0111] Among them, the outdoor heat exchanger 611, the compressor 612 and the intermediate heat exchanger 630 form a refrigerant circulation loop through the refrigerant pipeline, through which the outdoor heat absorbed by the outdoor heat exchanger 611 can be continuously transported to the intermediate heat exchanger 630. At the same time, the intermediate heat exchanger 630, the liquid pump 621 and the heating terminal device 622 are connected through the working medium pipeline to form a working medium circulation loop. The intermediate heat exchanger 630 can transfer the heat of the refrigerant to the working medium flowing through it to achieve the purpose of heating the working medium and increasing the working medium temperature. At the same time, under the driving action of the liquid pump 621, the heated working medium is transported to the heating terminal device 622 through the working medium circulation loop for its use.

[0112] In the above example, the electric heating device 40 is connected in series with the working medium circulation loop, and is used to controllably heat the working medium flowing through it, so as to supplement the heat when the heat supply of the heat pump system is insufficient. Here, the electric heating device 40 and the working medium circulation loop are assembled by pipe docking through the above-mentioned clamp 1, and the matching form can be referred to the above-mentioned embodiment, which will not be described in detail here.

[0113] Alternatively, the pipe group used in the heat pump system can be any two pipes in the above-mentioned refrigerant circulation loop and working fluid circulation loop that need to be docked and assembled, and the aforementioned clamp 1 can be used to realize convenient assembly and disassembly of the loop pipe group.

[0114] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A clamp for butt jointing of pipe groups, wherein the two butt joint ends of the pipe group are respectively provided with annular outer edges and are in contact with each other; characterized in that: The clamp comprises a clamp body, the clamp body has two clamp arms arranged in a U shape and each clamp arm is provided with a clamp groove; The two clamp arms can be elastically deformed to expand and rebound, and in the expanded state, the two butt ends can be at least partially accommodated in the U-shaped space of the clamp body, and after rebounding, the two outer edges can be clamped in the clamping groove.

2. The clamp according to claim 1, characterized in that: The clamping groove extends along the longitudinal direction of the corresponding clamping arm and is formed through the clamping arm in the thickness direction; The two outer edges at least partially extend into the clamping groove to limit the two butt ends from disengaging in the axial direction in the opposite direction.

3. The clamp according to claim 2, characterized in that: The groove width of the clamping groove along the axial direction of the tube group is greater than or equal to the sum of the axial thicknesses of the two outer page edges, so that the clamping groove and the two outer page edges form a clearance fit or a transition fit.

4. The clamp according to claim 1, characterized in that: The clamp arm has an arc-shaped arc section, and the clamp groove is at least opened in the arc section; Furthermore, the curvature of the arc-shaped segment is adapted to the curvature of the tube group, so that the inner side surface of the arc-shaped segment at least partially fits the outer tube wall of the tube group.

5. The clamp according to claim 4, characterized in that: The arc segment and the tube group satisfy the following relationship: L1≤R2, Wherein, L1 is the distance between the arc segment and the axis of the tube group in the non-elastic deformation state, and R2 is the outer tube wall radius of the tube group; Wherein, when the above relationship is satisfied and the clamping body clamps the tube set, the clamping body is in a non-elastic deformation state or a rebound tightening state.

6. The clamp according to claim 1, characterized in that: The clamp arm also has a flared section located at the free end of the clamp arm, and the flared section is extended obliquely outward to make the U-shaped opening of the clamp body gradually expand outward.

7. A pipe assembly, characterized in that: include: A first pipeline having a first butt end, wherein the first butt end is provided with a first annular outer edge; A second pipeline having a second butt end, wherein the second butt end is provided with a second annular outer edge; According to the clamp for pipe group docking as described in any one of claims 1 to 6, the clamp can clamp the first outer page edge and the second outer page edge in the clamping groove.

8. The tube assembly according to claim 7, characterized in that: The first butt joint end is formed with a first stirrup along its circumferential outward protrusion; the first outer leaf is outer-mounted on the first butt joint end and is located on a side of the first stirrup away from the second butt joint end; And / or, the second butt end is formed with a second stirrup along its circumferential outward protrusion; the second outer leaf is outerly disposed on the second butt end and is located on a side of the second stirrup away from the first butt end.

9. An electric heating device, characterized in that: include: The electric heating body comprises a heating tube cavity and a liquid inlet end tube and a liquid outlet end tube connected to the heating tube cavity, wherein the liquid inlet end tube is connected to a first external pipeline to input a working medium to be heated, and the liquid outlet end tube is connected to a second external pipeline to output a heated working medium; The clamp for pipe group docking as described in any one of claims 1 to 6, the clamp is used to clamp the liquid inlet end pipe and the first external pipeline, and / or clamp the liquid outlet end pipe and the second external pipeline.

10. A heat pump system, characterized in that: include: The tube assembly according to claim 7 or 8; And / or, the electric heating device as claimed in claim 9.

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