Pipe joint connection device and pipeline container cleaning device

Abstract

The invention discloses a pipe joint connection device and a pipeline container cleaning device. The pipeline container cleaning device comprises a pipe joint connection device and an automatic discharge device. The pipe joint connection device comprises two sets of symmetrically arranged connection mechanisms. The connection mechanism comprises: a connection block provided with a through hole and a hollow shaft arranged on one side thereof, a driving ring connected to the outer circle of the hollow shaft by a thread, a connecting pipe arranged in the hollow shaft, the outer end face of the driving ring is connected to the large end of a conical sealing ring arranged on the outer end pipe of the connecting pipe, the inner end face of the driving ring is connected to at least one pair of connecting rod structures arranged on the symmetrical hollow shaft, and the connecting rod structure is provided with a clamping block. The driving ring rotates to reciprocate along the axial direction of the hollow shaft, and when the conical sealing ring is driven to slide toward the outer end, the clamping block can be driven to slide through the hollow shaft toward the center and clamp the inner end outer circle of the connecting pipe. The pipeline container cleaning device can be automatically cleaned and has high working efficiency. It can be monitored in real time and has enhanced safety.

Description

Technical Field

[0001] The invention relates to auxiliary equipment for cleaning pipeline containers, and in particular to a pipe joint connecting device and a pipeline container cleaning device. Background Art

[0002] In industrial production or daily life, it is often necessary to temporarily connect two pipes to each other for the purpose of repairing and maintaining related equipment. In order to achieve the docking of two pipes, a special pipe joint connection device is required to dock the two pipe ports, and at the same time, the connection must be convenient and the sealing must be reliable. Since the refrigeration industry such as air conditioning involves a large number of containers and pipes, it is often necessary to relatively connect the pipe ports between the containers and the pipes, and between the pipes. Many of the pipe joint connections are temporary for maintenance. For example, the air conditioning heat exchanger is a key component for heat exchange in the air conditioning system. Its main function is to transfer heat from indoors to outdoors or from outdoors to indoors to adjust the indoor temperature. However, during the long-term use of the heat exchanger, dust, dirt and other residues are easily accumulated in the pipe, which not only affects the heat exchange efficiency of the heat exchanger, but also causes the energy efficiency of the air conditioning system to decrease. Therefore, the pipes of the heat exchanger need to be cleaned frequently. The traditional cleaning method is to use pressurized nitrogen to clean the pipes of the heat exchanger, and the cleaning process usually relies on manual assisted cleaning. For example, the heat exchanger is manually disassembled, and the pipe for transporting nitrogen is directly connected to the pipe inlet of the heat exchanger to clean the inside of the pipe. In addition, during the cleaning process, it is necessary to manually control the discharge of the heat exchanger pipe outlet, that is, it is necessary to constantly open and close the heat exchanger pipe outlet by hand to regularly discharge the dust, dirt and other residues that are cleaned. Such cleaning is complicated, time-consuming and labor-intensive, inefficient, and easy to cause equipment damage. Manual operation has certain safety hazards, especially in a high-pressure nitrogen environment, improper operation may lead to accidents. During the cleaning process, it is also impossible to monitor the changes in pipeline pressure in real time, and the pressure may be too high or too low, affecting the cleaning effect and equipment safety, resulting in incomplete cleaning or excessive cleaning, and it is difficult to ensure the consistency of the cleaning effect each time.

[0003] Therefore, how to overcome the defects of low efficiency, difficulty in ensuring cleaning quality and potential safety hazards in the existing heat exchanger pipe cleaning process is a technical problem that needs to be solved in this field. Summary of the invention

[0004] In order to solve the technical problems of low efficiency, difficulty in ensuring cleaning quality and potential safety hazards in the existing heat exchanger pipeline cleaning process, the present invention provides a pipe joint connection device that can be quickly assembled and disassembled and has reliable sealing, and a pipeline container cleaning device including the pipe joint connection device.

[0005] A pipe joint connection device provided by the present invention is characterized in that it is composed of two sets of connection mechanisms that are butt-jointed with each other in reverse order; the connection mechanism includes: a connection block with a through hole in the middle, a hollow shaft connected to the through hole and arranged on one side of the connection block, a driving ring threadedly connected to the outer circle of the hollow shaft, a connecting pipe arranged in the inner circle of the hollow shaft, and a conical sealing ring arranged on the pipe at the outer end of the connecting pipe, the large end of the conical sealing ring being connected to the outer end face of the driving ring, and moving toward the outer end while rotating around the hollow shaft, and driving the conical sealing ring to slide toward the outer end.

[0006] Insert the outer end of the connecting pipe of the connecting mechanism into the pipeline inlet, then rotate the driving ring to move horizontally, and at the same time drive the conical sealing ring to squeeze into the pipeline inlet of the heat exchanger. The diameter of the conical sealing ring increases along the axial direction, and the inner circle of the pipeline inlet is expanded and connected radially. Since the outer circle of the conical sealing ring is an elastic part, its elastic deformation can be used to reliably seal the pipeline inlet and the conical sealing ring radially. When disassembling, the conical sealing ring can be easily pulled out by rotating the driving ring in the opposite direction. The pipe joint connection device is easy to operate, has a firm connection, and a reliable seal.

[0007] Preferably, it also includes at least one pair of connecting rod structures symmetrically arranged along the axial direction of the hollow shaft, each connecting rod structure is provided with a clamping block, when the driving ring rotates and moves along the axial direction of the hollow shaft, the connecting rod structure drives the clamping block to lean against the side of the connecting block and slide back and forth along the radial direction of the hollow shaft; when the clamping block passes through the sliding groove on the hollow shaft and slides toward the axis center of the hollow shaft, it can clamp the outer circle of the inner end of the connecting tube.

[0008] A pair of connecting rod structures are arranged axially on the outer periphery of the hollow shaft near the connecting block. When the driving ring is rotated to drive the conical sealing ring to perform connection sealing, the clamping block on it is driven by the connecting rod structure to slide toward the axis of the hollow shaft so as to clamp the outer circle of the inner end of the connecting pipe. Thus, the connecting seal cooperates with the connection seal of the outer end of the connecting pipe, that is, both the inner and outer ends of the connecting pipe are connected and fixed, so that the connection is stable and firm.

[0009] Preferably, the connecting rod structure includes a connecting rod and a slider disposed in an annular groove on the outer circle of the driving ring, one end of the connecting rod is hinged to the slider, and the other end of the connecting rod is hinged to the clamping block. When the driving ring makes axial reciprocating movement, the rigidity of the connecting rod can be utilized to prevent deformation, so as to drive the clamping block to reciprocate along the radial direction of the hollow shaft, so as to achieve efficient and accurate clamping or loosening of the inner end of the connecting pipe.

[0010] Preferably, the connecting rod structure is in two pairs, which are respectively arranged along the top and bottom and left and right of the hollow shaft. The clamping blocks symmetrically clamp the connecting pipe from four directions, with uniform force and stable connection.

[0011] Preferably, the inner end outer circle of the connecting tube is provided with a clamping groove, and the clamping surface of the clamping block is provided with a concave-convex structure that cooperates with the clamping groove to clamp. The concave-convex structure provided on the clamping surface of the clamping block is clamped with the clamping groove provided on the outer circle of the connecting tube, so that the clamping block clamps the connecting tube more firmly and the connection is more stable.

[0012] Preferably, the clamp block is connected to a slide plate arranged in the slide groove of the connecting block, and the slide plate slides back and forth along the radial direction of the hollow shaft together with the clamp block. The reciprocating movement of the clamp block along the radial direction of the hollow shaft is associated with the slide groove in the connecting block to prevent the clamp block from changing direction when moving, that is, the movement of the clamp block is restricted and guided by the slide groove in the connecting block, so as to achieve accurate movement and prevent the clamp block from falling off.

[0013] Preferably, the conical sealing ring comprises two layers of inner and outer rings, the outer ring is an elastic sealing ring, and the inner ring is a rigid sealing ring. The outer ring is an elastic sealing ring, which is conducive to sealing, and the inner ring is a rigid sealing ring, which facilitates the conical sealing ring to enter or exit the inner circle of the pipeline.

[0014] Preferably, the elastic sealing ring is made of rubber or plastic, and the rigid sealing ring is made of plastic or metal. Different materials are used to prepare the inner and outer rings of the conical sealing ring so as to effectively achieve their respective purposes.

[0015] The pipeline container cleaning device provided by the present invention is characterized in that it includes the pipe joint connection device provided by the present invention, the pipe joint connection device connects the pipeline inlet with the cleaning agent source, and also includes an automatic discharge device connected to the pipeline outlet. The pipeline inlet is connected to the cleaning agent source through the pipe joint connection device, which is convenient for introducing the cleaning medium, and the automatic discharge device is connected to the pipeline outlet to facilitate automatic cleaning and discharge.

[0016] Preferably, the automatic discharge device includes a pressure gauge and a safety valve. The pressure discharged by the safety valve is adjusted as needed, and the pressure inside the heat exchanger pipeline can be monitored in real time through the pressure gauge to achieve safe automatic discharge.

[0017] The pipe joint connection device of the present invention inserts the connecting pipe at one end into the pipe inlet of the heat exchanger through a symmetrically arranged connection mechanism, so that the pipe inlet is initially sleeved on the outer circle of the front end of the conical sealing ring. Then the driving ring on the connection mechanism is rotated and moved horizontally at the same time, so as to drive the conical sealing ring to squeeze into the pipe inlet of the heat exchanger, and the conical sealing ring is radially expanded and connected with the inner circle of the pipe inlet by utilizing the structure that the diameter of the conical sealing ring increases along the axial direction. Since the outer circle of the conical sealing ring is an elastic part, its elastic deformation can be used to reliably seal the pipe inlet and the conical sealing ring radially. The inner ring of the conical sealing ring is a rigid part, which facilitates the driving ring to squeeze the conical sealing ring horizontally into the pipe inlet of the heat exchanger. Similarly, the connection mechanism at the other end of the pipe joint connection device can be connected to a cleaning agent source, for example, connected to the pipe outlet of a nitrogen bottle. In this way, the pipe inlet of the heat exchanger can be conveniently connected with the cleaning agent source. When disassembly is required, it is only necessary to rotate the driving ring in the opposite direction to pull the conical sealing ring out horizontally. The automatic discharge device provided by the present invention is connected to the pipeline outlet of the heat exchanger, and the discharge pressure of the safety valve is adjusted according to needs. Then, the pressure inside the heat exchanger pipeline can be monitored in real time through a pressure gauge to achieve safe automatic discharge.

[0018] Compared with the traditional manual nitrogen cleaning method of the heat exchanger pipeline, the pipeline container cleaning device of the present invention can realize automatic cleaning operation, save time and labor costs, simplify the operation steps, and improve the cleaning efficiency. The cleaning device can accurately control the flow and pressure of nitrogen to ensure the consistent effect of each cleaning, and reduce the failure rate caused by incomplete cleaning. At the same time, by real-time monitoring and control of pressure, the safety of the cleaning process is enhanced, and equipment damage and safety accidents caused by abnormal pressure are avoided. Real-time monitoring and feedback functions help to discover and solve problems in a timely manner, ensure the smooth progress of the cleaning process, and improve the overall maintenance effect and long-term performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the pipeline container cleaning device of the present invention being used for cleaning the pipeline of a heat exchanger;

[0020] Figure 2 It is a schematic diagram of the appearance of the pipe joint connection device of the present invention;

[0021] Figure 3 It is a schematic diagram of a connecting block and a hollow shaft in the pipe joint connecting device of the present invention;

[0022] Figure 4 is a schematic diagram of a driving ring in a pipe joint connection device of the present invention;

[0023] Figure 5 It is a cross-sectional view of a conical sealing ring in the pipe joint connection device of the present invention;

[0024] Figure 6 It is a three-dimensional schematic diagram of the connection mechanism on the right side of the pipe joint connection device of the present invention;

[0025] Figure 7 for Figure 6 A schematic diagram of a partial section projected on the right;

[0026] Figure 8 for Figure 6 A schematic diagram of a partial section view projected on the left;

[0027] Fig. 9 It is a three-dimensional schematic diagram of the automatic discharge device of the present invention.

[0028] In the figure:

[0029] 1-Automatic discharge device;

[0030] 2-Heat exchanger;

[0031] 3-Connection mechanism;

[0032] 31-connecting block; 310-sliding groove; 311-hollow shaft; 312-external thread; 313-through hole;

[0033] 32-clamp block;

[0034] 320-concave-convex structure; 321-sliding sheet;

[0035] 33-connecting rod;

[0036] 34- Slider;

[0037] 35-driving ring;

[0038] 351-annular groove, 352-internal thread;

[0039] 36-elastic sealing ring;

[0040] 37- Rigid sealing ring;

[0041] 38-connecting pipe;

[0042] 39-card slot;

[0043] 4-Connection device;

[0044] 5-Pipeline outlet;

[0045] 6-Pipeline inlet;

[0046] 11-Safety valve;

[0047] 12- Pressure gauge. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the present invention and do not constitute a limitation to the present invention.

[0049] Since the traditional method of cleaning the heat exchanger pipes is to use nitrogen and rely on manual cleaning, the existing cleaning method has the problems of low efficiency, difficult to ensure the cleaning quality, and potential safety hazards. Figure 1 As shown, the present invention provides a set of equipment for assisting in cleaning the pipes of a heat exchanger.

[0050] First, the present invention provides an embodiment of a pipe joint connection device, such as Figure 2 , Figure 3 As shown, the pipe joint connection device 4 is composed of two sets of connection mechanisms 3 that are butt-jointed with each other in reverse, that is, the two sets of connection mechanisms 3 are connected and arranged in a left-right symmetrical manner, and a left-right communicating structure is formed inside to facilitate fluid flow.

[0051] like Figure 2-Figure 7 As shown, the connection mechanism 3 described in the present invention includes: a vertically arranged connection block 31, the middle part of which is provided with a through hole 313. A hollow shaft 311 connected to the through hole 313 is provided on the right side of the fixed plate. The hollow shaft 311 and the connection block 31 can be made in one piece, or can be made separately and then connected into one piece. It also includes a driving ring 35 arranged on the outer circle of the hollow shaft 311, the outer circle of the hollow shaft 311 is provided with an external thread 312, and the inner circle of the driving ring 35 is provided with an internal thread 352, so that the driving ring 35 and the hollow shaft 311 form a threaded connection. When the driving ring 35 rotates around the hollow shaft 311, it can also reciprocate along the axial direction of the hollow shaft 311. A connecting pipe 38 is provided in the inner circle of the hollow shaft 311, and the outer end outer circle of the connecting pipe is conical, which is convenient for plugging and installing with a pipe joint. A conical sealing ring is sleeved on the outer end pipe of the connecting pipe 38, and the outer end face of the driving ring 35 is connected to the large end of the conical sealing ring. When the driving ring 35 rotates relative to the hollow shaft 311 and moves toward the outer end, the conical sealing ring can be driven to slide toward the outer end. When the driving ring 35 rotates and moves toward the inner end, the conical sealing ring can be pulled to slide in the opposite direction. Figure 5 As shown, the conical sealing ring comprises two layers of inner and outer rings, the outer ring is an elastic sealing ring 36, and the inner ring is a rigid sealing ring 37. The elastic sealing ring 36 can be made of rubber or plastic, and the rigid sealing ring 37 can be made of plastic or metal. Since the conical sealing ring is a conical structure, it becomes looser when pulled out in the reverse direction. Therefore, the connection between the drive ring 35 and the large end of the conical sealing ring can be welding, bonding or clamping, etc., as long as it can be pulled out in the reverse direction, the connection can be removed.

[0052] like Figure 7 , Figure 8As shown, in the second embodiment of the pipe joint connection device of the present invention, at least one pair of connecting rod structures are provided near the side of the connecting block 31, symmetrical to the hollow shaft 311 and along the axial direction of the hollow shaft, and each connecting rod structure is provided with a clamping block 32. When the driving ring 35 rotates and moves along the axial direction of the hollow shaft 311, the clamping block 32 can be driven to slide back and forth along the radial direction of the hollow shaft 311 by the connecting rod structure. This embodiment adopts two pairs of connecting rod structures and is symmetrically arranged, that is, one pair of connecting rod structures is arranged along the upper and lower sides of the hollow shaft 311, and the other pair is arranged along the left and right sides of the hollow shaft 311. The connecting rod structure includes a connecting rod 33 and a slider 34 arranged in an annular groove 351 on the outer circle of the driving ring 35, one end of the connecting rod 33 is hinged to the slider 34, and the other end of the connecting rod is hinged to the clamping block 32. When the driving ring 35 rotates and moves axially, the slider 34 slides relative to the annular groove 351 and moves axially with the driving ring 35, and the two ends of the connecting rod 33 rotate around their hinges respectively, performing a composite motion of both rotation and translation, and at the same time, the clamping block 32 is driven to lean against the side of the connecting block 31 and slide back and forth along the radial direction of the hollow shaft 311. When the clamping block 32 passes through the sliding groove 310 on the hollow shaft 311 and slides toward the axis of the hollow shaft, it can clamp the outer circle of the inner end of the connecting pipe 38. When the driving ring 35 rotates and moves to the outer end so that the conical sealing ring expands the pipe inlet of the heat exchanger and then connects and seals, the clamping block 32 in each team of connecting rod structures moves toward the center of the hollow shaft 311, thereby clamping the outer circle of the inner end of the connecting pipe 38. The outer circle of the inner end of the connecting pipe 38 is provided with a clamping groove 39, and the clamping surface of the clamping block 32 is provided with a concave-convex structure 320 that cooperates with the clamping groove 39 to clamp. Through the cooperation between the concave-convex structure 320 of the clamp block 32 and the clamping groove 39, the clamp block 32 can firmly clamp the connecting pipe 38. By clamping the inner end of the connecting pipe and expanding and connecting the outer circle of the outer end with the inner circle of the pipeline inlet, the connecting pipe 38 can be stably connected and fixed.

[0053] like Figure 6 , Figure 7 and Figure 8 As shown, each clamping block 32 is provided with a sliding piece 321 on one side facing the connecting block 31. The sliding piece is arranged in a sliding groove in the connecting block 31, and the sliding groove is arranged along the radial direction of the hollow shaft 311. That is, the sliding groove is used to guide the sliding of the sliding piece 321 and to limit the sliding piece 321 from slipping out. Therefore, the sliding piece 321 needs to be installed from the back side of the connecting block 31 and then fixedly connected with the clamping block 32. Then, the sliding piece 321 can slide back and forth along the radial direction of the hollow shaft 311 together with the clamping block 32.

[0054] The pipe joint connection device 4 provided by the present invention (such as Figure 2The automatic discharge device 1 provided by the present invention can be used for connection and cleaning of heat exchanger pipes.

[0055] Secondly, the present invention also provides a pipeline container cleaning device, such as Figure 1 , Figure 2 and Fig. 9 As shown, it includes the pipe joint connection device 4 provided by the invention, which can connect the pipeline inlet with the cleaning agent source, for example, connecting the pipeline inlet 6 of the heat exchanger 2 with the output pipe mouth of the nitrogen bottle. It also includes an automatic discharge device 1 provided at the pipeline outlet 5 of the heat exchanger 2. The automatic discharge device 1 includes a pressure gauge 12 and a safety valve 11. By adjusting the safety pressure of the safety valve and opening the nitrogen, the automatic cleaning of the refrigerant pipeline of the heat exchanger can be achieved.

[0056] Please combine Figure 1 , Figure 2 and Figure 6 , Figure 7 , the installation of the pipeline container cleaning device of the present invention is:

[0057] First, insert the outer end of the connecting pipe 38 of the connecting mechanism 3 on the right side of the pipe joint connecting device 4 into the inner circle of the pipe inlet 6 of the heat exchanger, so that the pipe inlet 6 is initially sleeved on the outer circle of the front end of the conical sealing ring. Then, the driving ring 35 is rotated and moved to the right by hand or by a tool, and the conical sealing ring on the right is driven to squeeze into the pipe inlet 6 of the heat exchanger. By utilizing the structure that the diameter of the conical sealing ring increases along the axial direction, the outer circle of the elastic sealing ring 36 and the inner circle of the pipe inlet 6 of the heat exchanger 2 are gradually expanded and tightened, thereby realizing the connection between the pipe joint connecting device 4 and the pipe inlet 6 of the heat exchanger 2. Since the outer circle of the conical sealing ring is the elastic sealing ring 36, its elastic deformation can be used to reliably seal the radial direction between the pipe inlet 6 and the conical sealing ring. The inner circle of the conical sealing ring is a rigid sealing ring 37, which facilitates the driving ring 35 to squeeze the conical sealing ring into the pipe inlet 6 of the heat exchanger laterally. At this moment, the clamping block 32 in each team of connecting rod structures moves toward the center of the hollow shaft 311 and clamps the outer circle of the inner end of the connecting pipe 38. By clamping the inner end of the connecting pipe 38 and radially expanding and connecting the outer end of the connecting pipe 38 with the pipeline inlet 6, the connecting pipe 38 is stably connected. Similarly, the connecting mechanism 3 at the left end of the pipe joint connecting device 4 can also be connected to the pipeline outlet of the nitrogen bottle. In this way, the pipeline inlet of the heat exchanger can be connected to the nitrogen bottle conveniently. If it is to be disassembled, just rotate the driving ring 35 in the opposite direction to pull out the conical sealing ring laterally.

[0058] like Figure 1As shown, the pipe outlet 5 of the heat exchanger 2 can be connected to the automatic discharge device 1 through the pipe joint connection device 4 of the present invention. The pipe outlet 5 of the heat exchanger 2 can also be connected to the automatic discharge device 1 through a threaded connection. After the installation is completed, the safety pressure of the safety valve 11 is adjusted, and the automatic cleaning of the heat exchanger pipe can be started.

[0059] After the pipeline container cleaning device of the present invention is installed and connected to the heat exchanger, check to ensure that all connection parts are well sealed and leak-free. The cleaning process for the heat exchanger can be started: open the valve of the nitrogen bottle, and deliver high-pressure nitrogen to the inside of the pipeline of the heat exchanger 2 through the pipe joint connection device 4. During the cleaning process, the pressure gauge 12 of the automatic discharge device 1 monitors various parameters in the pipeline of the heat exchanger 2, such as pressure, flow, etc., in real time, and provides real-time feedback to ensure that the pressure is within a safe range, so that the cleaning process proceeds smoothly. For conventional cleaning tasks, the pressure safety range is 0.1 MPa-0.3 MPa. According to needs, adjust the pressure discharged by the safety valve, and then use the pressure gauge to monitor the pressure inside the heat exchanger pipeline in real time to achieve effective automatic discharge. After the cleaning is completed, close the valve of the nitrogen bottle, remove the pipeline container cleaning device, check the cleaning effect inside the heat exchanger, and ensure that the cleaning is thorough.

[0060] Compared with the traditional manual nitrogen cleaning method of the heat exchanger pipeline, the pipeline container cleaning device of the present invention can realize automatic cleaning operation, save time and labor costs, simplify the operation steps, and improve the cleaning efficiency. The cleaning device can accurately control the flow and pressure of nitrogen to ensure the consistent effect of each cleaning, and reduce the failure rate caused by incomplete cleaning. At the same time, by real-time monitoring and control of pressure, the safety of the cleaning process is enhanced, and equipment damage and safety accidents caused by abnormal pressure are avoided. Real-time monitoring and feedback functions help to discover and solve problems in a timely manner, ensure the smooth progress of the cleaning process, and improve the overall maintenance effect and long-term performance of the equipment.

[0061] It should be noted that the terms used in this specification are only for describing specific embodiments and are not intended to limit the present invention. Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the technical features and steps described in these embodiments do not limit the scope of protection of the present invention. For the technology, methods and equipment known to ordinary technicians in the relevant field, this specification is not discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of this specification. Any specific value in this specification should be interpreted as being merely exemplary and not constituting a limitation of the present invention.

[0062] For the convenience of description, the terms describing the position used in the specification, such as "above...", "to the left of...", "in front of...", etc., are only used to describe the spatial position relationship between a certain component and other components of the embodiment shown in the figure. When the position of the component is different, the relative position will change. Therefore, the position relationship of the embodiment of the drawing should not constitute a limitation to the present invention.

[0063] In addition, it should be noted that the words "first", "second" and the like used in the specification are only used to distinguish similar components, and there is no order of precedence, so they cannot be understood as limiting the scope of protection of the present invention. The above description is only a specific implementation of the present invention. It should be pointed out that any modification, equivalent substitution and change made within the spirit and framework of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe joint connection device, consisting of two sets of back-to-back connection mechanisms, characterized in that: The connecting mechanism includes: a connecting block provided with a through hole, a hollow shaft connected to the through hole and arranged on a side surface of the connecting block, a driving ring connected to the outer circle of the hollow shaft by a thread, and a connecting pipe arranged in the inner circle of the hollow shaft, the outer end surface of the driving ring is connected to the large end of a tapered sealing ring arranged on the outer end pipe of the connecting pipe, the inner end surface of the driving ring is connected to at least a pair of connecting rod structures symmetrical to the hollow shaft and arranged along its axial direction, and each connecting rod structure is provided with a clamping block; the driving ring rotates and can reciprocate along the axial direction of the hollow shaft, and when the driving ring drives the tapered sealing ring to slide toward the outer end, the driving ring can drive the clamping block to lean against the side surface of the connecting block and slide through the hollow shaft along the radial direction of the hollow shaft to the center of the hollow shaft, thereby clamping the inner end outer circle of the connecting pipe.

2. The pipe joint connection device according to claim 1, characterized in that: The connecting rod structure comprises a connecting rod and a sliding block arranged in an annular groove on the outer circle of the driving ring. One end of the connecting rod is hinged to the sliding block, and the other end of the connecting rod is hinged to the clamping block.

3. The pipe joint connection device according to claim 1, characterized in that: The connecting rod structure comprises two pairs, which are respectively arranged along the top and bottom and the left and right of the hollow shaft.

4. The pipe joint connection device according to claim 1, characterized in that: A clamping groove is arranged on the outer circle of the inner end of the connecting pipe, and a concave-convex structure which cooperates with the clamping groove and is clamped is arranged on the clamping surface of the clamping block.

5. The pipe joint connection device according to claim 1, characterized in that: The clamping block is connected with a sliding plate arranged in the sliding groove of the connecting block, and the sliding plate slides back and forth along the radial direction of the hollow shaft together with the clamping block.

6. The pipe joint connection device according to claim 1, characterized in that: The conical sealing ring comprises two layers of inner and outer rings, the outer ring is an elastic sealing ring, and the inner ring is a rigid sealing ring.

7. The pipe joint connection device according to claim 6, characterized in that: The elastic sealing ring is made of rubber or plastic, and the rigid sealing ring is made of plastic or metal.

8. A pipeline container cleaning device, characterized in that: It comprises a pipe joint connecting device as described in any one of claims 1 to 7, which connects a pipeline inlet with a cleaning agent source, and also comprises an automatic discharge device connected to the pipeline outlet.

9. The pipeline container cleaning device according to claim 8, characterized in that: The automatic discharge device comprises a pressure gauge and a safety valve.

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