Hydraulic control system for compression garbage truck and compression garbage truck

Abstract

According to the hydraulic control system for the compression garbage truck and the compression garbage truck, when the pressure is abnormal, a main overflow valve can balance the oil pressure of an oil way; when the pressure exceeds a set threshold value, the main overflow valve can send a cut-off instruction to all sub-controllers connected to the lifting cut-off valve, the sliding plate cut-off valve, the scraper cut-off valve and the compression cut-off valve to control the corresponding cut-off valves to cut off an oil way, and the conditions of equipment damage and cylinder explosion caused by abnormal pressure are avoided; and the equipment maintenance is also facilitated.

Description

Technical Field

[0001] The utility model relates to the field of hydraulic control of a compression garbage truck, in particular to a hydraulic control system for a compression garbage truck and the compression garbage truck. Background Art

[0002] With the standardization of urban garbage transfer management, fully sealed compression garbage trucks have been widely used. They collect garbage by quickly compressing it, and due to the pressure warning and monitoring during the hydraulic operation process, the safety of personnel can be guaranteed during operation.

[0003] The hydraulic control of the existing compression garbage truck is mainly for the control of the lifting mechanism, the slide mechanism, the scraper mechanism and the compression mechanism. There is a lack of a pressure warning self-checking system, which can easily lead to equipment damage and cylinder explosion when encountering abnormal pressure. Utility Model Content

[0004] In view of the above problems, the present application provides a hydraulic control system and a compressed garbage truck for a compressed garbage truck, which are used to solve the technical problem that the hydraulic control of the compressed garbage truck in the prior art lacks a pressure warning self-inspection system, which easily leads to equipment damage and cylinder explosion when encountering abnormal pressure.

[0005] To achieve the above-mentioned purpose, in the first aspect, the inventor provides a hydraulic control system for a compression garbage truck, including a main oil circuit, a main oil circuit module, a lifting oil circuit, a lifting module, a skateboard oil circuit, a skateboard module, a scraper oil circuit, a scraper module, a compression oil circuit, a compression module, a first reversing valve, a second reversing valve and four pressure sensors; a main oil circuit module is provided on the main oil circuit, and the main oil circuit module includes an oil tank, a filter, a hydraulic pump and a main overflow valve, the oil tank is connected to the hydraulic pump through the filter, and the main overflow valve is connected to the hydraulic pump; the lifting oil circuit is provided with a main oil circuit module, and the main oil circuit module includes a main ... main oil tank is connected to the hydraulic pump through the filter, and the main overflow valve is connected to the hydraulic pump; the lifting oil circuit is provided with a main oil circuit module, and the main oil circuit module includes a main oil tank, a filter, a hydraulic pump and a main overflow valve. The oil inlet is connected to the oil outlet of the main oil circuit through the first reversing valve, a lifting module is arranged on the lifting oil circuit, the lifting module includes a lifting stop valve and a lifting hydraulic component, the oil inlet of the lifting stop valve is connected to an oil outlet of the first reversing valve, and the oil outlet of the lifting stop valve is connected to the lifting hydraulic component; the oil inlet of the skateboard oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve and the second reversing valve, a skateboard module is arranged on the skateboard oil circuit, the skateboard module includes a skateboard stop valve and a skateboard hydraulic component, the oil inlet of the skateboard stop valve is connected to the second One oil outlet of the reversing valve is connected, and the oil outlet of the skateboard stop valve is connected to the skateboard hydraulic component; the oil inlet of the scraper oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve and the second reversing valve, and a scraper module is arranged on the scraper oil circuit, and the scraper module includes a scraper stop valve and a scraper hydraulic component, the oil inlet of the scraper stop valve is connected to the other oil outlet of the second reversing valve, and the oil outlet of the scraper stop valve is connected to the scraper hydraulic component; the oil inlet of the scraper oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve, and a scraper oil circuit is arranged There is a compression module, which includes a compression stop valve and a compression hydraulic component. The oil inlet of the compression stop valve is connected to the other oil outlet of the first reversing valve, and the oil outlet of the compression stop valve is connected to the compression hydraulic component; four pressure sensors are respectively installed on the lifting oil circuit, the slide plate oil circuit, the scraper oil circuit and the compression oil circuit. The four pressure sensors are communicatively connected with the main overflow valve. The main overflow valve is used to control the lifting stop valve and / or the slide plate stop valve and / or the scraper stop valve and / or the compression stop valve to cut off the corresponding oil circuit according to the pressure signal of the pressure sensor.

[0006] As an embodiment of the utility model, the lifting hydraulic assembly includes a lifting reversing valve, a lifting cylinder and a two-way hydraulic lock, the oil inlet of the two-way hydraulic lock is connected to the oil outlet of the lifting stop valve, and the oil outlet of the two-way hydraulic lock is connected to the lifting cylinder through the lifting reversing valve.

[0007] As an embodiment of the utility model, the skateboard hydraulic assembly includes a skateboard reversing valve and a skateboard cylinder, the oil inlet of the skateboard reversing valve is connected to the oil outlet of the skateboard stop valve, and the oil outlet of the skateboard reversing valve is connected to the skateboard cylinder.

[0008] As an embodiment of the utility model, the skateboard hydraulic assembly also includes a third reversing valve and a skateboard backup reversing valve. The oil inlet of the third reversing valve is connected to the oil outlet of the skateboard stop valve. The oil outlet of the third reversing valve is respectively connected to the oil inlets of the skateboard reversing valve and the skateboard backup reversing valve. The oil outlets of the skateboard reversing valve and the skateboard backup reversing valve are both connected to the skateboard cylinder.

[0009] As an embodiment of the utility model, the scraper hydraulic assembly includes a scraper reversing valve and a scraper cylinder, the oil inlet of the scraper reversing valve is connected to the oil outlet of the scraper stop valve, and the oil outlet of the scraper reversing valve is connected to the scraper cylinder.

[0010] As an embodiment of the utility model, the scraper hydraulic assembly also includes a fourth reversing valve and a scraper backup reversing valve. The oil inlet of the fourth reversing valve is connected to the oil outlet of the scraper stop valve. The oil outlet of the fourth reversing valve is respectively connected to the oil inlets of the scraper reversing valve and the scraper backup reversing valve. The oil outlets of the scraper reversing valve and the scraper backup reversing valve are both connected to the scraper cylinder.

[0011] As an embodiment of the utility model, the compression hydraulic assembly includes a speed control valve, a compression reversing valve, an air compressor, an air filter and a booster cylinder; the oil inlet of the speed control valve is connected to the oil outlet of the compression stop valve, the oil outlet of the speed control valve is connected to the booster cylinder through the compression reversing valve, the air compressor is connected to the booster cylinder through the air filter, and the air compressor is used to provide compressed air to the booster cylinder.

[0012] As an embodiment of the utility model, the compression hydraulic component also includes a fifth reversing valve and a compression standby reversing valve, the oil inlet of the fifth reversing valve is connected to the oil outlet of the compression stop valve, the oil outlet of the fifth reversing valve is respectively connected to the oil inlets of the compression reversing valve and the compression standby reversing valve, and the oil outlets of the compression reversing valve and the compression standby reversing valve are both connected to the boosting cylinder.

[0013] As an implementation mode of the utility model, the compression hydraulic assembly further includes a load relief valve, and the oil return ports of the compression reversing valve and the compression standby reversing valve are connected to the oil tank through the load relief valve.

[0014] To achieve the above objectives, in a second aspect, the inventor provides a compression garbage truck, comprising any hydraulic control system for a compression garbage truck provided by the inventor above.

[0015] Different from the prior art, the technical solution of the present application is equipped with pressure sensors in the lifting oil circuit, skateboard oil circuit, scraper oil circuit and compression oil circuit. When abnormal pressure occurs, the main overflow valve will balance the oil pressure in the oil circuit; and when the pressure exceeds the set threshold, the main overflow valve will send a cut-off command to each sub-controller connected to the lifting stop valve, skateboard stop valve, scraper stop valve and compression stop valve to control the corresponding stop valve to cut off the oil circuit, thereby avoiding equipment damage and cylinder explosion due to abnormal pressure, and is also beneficial to the maintenance of the equipment.

[0016] The above-mentioned records related to the content of the utility model are only an overview of the technical solution of the present application. In order to enable ordinary technicians in the field to more clearly understand the technical solution of the present application, and then implement it according to the text of the specification and the contents recorded in the drawings, and to make the above-mentioned purpose and other purposes, features and advantages of the present application easier to understand, the following is an explanation in combination with the specific implementation method and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are only used to illustrate the principles, implementation methods, applications, characteristics and effects of the specific embodiments of the present application and other related contents, and shall not be considered as limitations of the present application.

[0018] In the drawings of the specification:

[0019] Figure 1 A hydraulic principle diagram of a hydraulic control system for a compression garbage truck according to an embodiment of the present application;

[0020] Figure 2 This is a hydraulic principle diagram of a main oil circuit module installed on a main oil circuit according to an embodiment of the present application;

[0021] Figure 3 This is a hydraulic principle diagram of a lifting module installed on a lifting oil circuit according to an embodiment of the present application;

[0022] Figure 4 A hydraulic principle diagram of a slide module installed on a slide oil circuit according to an embodiment of the present application;

[0023] Figure 5 This is a hydraulic principle diagram of a scraper module according to an embodiment of the present application installed on a scraper oil circuit;

[0024] Figure 6 A hydraulic principle diagram showing a compression module installed on a compression oil circuit according to an embodiment of the present application;

[0025] Figure 7 The schematic diagram of the principle of a two-way hydraulic lock according to an embodiment of the present application is shown in FIG. Figure 1 ;

[0026] Figure 8The schematic diagram of the principle of a two-way hydraulic lock according to an embodiment of the present application is shown in FIG. Figure 2 ;

[0027] Fig. 9 The schematic diagram of the principle of a two-way hydraulic lock according to an embodiment of the present application is shown in FIG. Figure 3 .

[0028] The reference numerals in the above drawings are described as follows:

[0029] 100. Hydraulic control system for compression garbage truck;

[0030] 1. Main oil circuit;

[0031] 2. Main oil circuit module, 21. Oil tank, 22. Filter, 23. Hydraulic pump, 24. Main overflow valve;

[0032] 3. Lifting oil circuit;

[0033] 4. Lifting module, 41. Lifting stop valve, 42. Lifting hydraulic assembly, 421. Lifting reversing valve, 422. Lifting cylinder, 423. Two-way hydraulic lock;

[0034] 5. Skateboard oil circuit;

[0035] 6. Slide plate module; 61. Slide plate stop valve, 62. Slide plate hydraulic assembly, 621. Slide plate reversing valve, 622. Slide plate oil cylinder, 623. Third reversing valve, 624. Slide plate spare reversing valve;

[0036] 7. Scraper oil circuit;

[0037] 8. Scraper module; 81. Scraper stop valve, 82. Scraper hydraulic assembly, 821. Scraper reversing valve, 822. Scraper oil cylinder, 823. Fourth reversing valve, 824. Scraper spare reversing valve;

[0038] 9. Compression module; 91. Compression stop valve, 92. Compression hydraulic assembly, 921. Speed ​​regulating valve, 922. Compression reversing valve, 923. Air compressor, 924. Air filter, 925. Booster cylinder, 926. Fifth reversing valve, 927. Compression standby reversing valve, 928. Unloading relief valve, 929. Air reversing valve;

[0039] 10. Compression oil circuit;

[0040] 11. The first reversing valve;

[0041] 12. Second reversing valve. DETAILED DESCRIPTION

[0042] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Reference to "embodiment" herein means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0044] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0045] In the description of this application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in an "or" logical relationship.

[0046] In the present application, terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0047] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0048] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0049] In the description of the embodiments of the present application, space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0050] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0051] According to some embodiments of the present application, the present embodiment relates to a compression garbage truck, including a hydraulic control system 100 for the compression garbage truck.

[0052] The compression garbage truck of the technical solution of the present application can efficiently complete the compression work of the garbage truck and avoid stopping the compression work due to failure or equipment damage. At the same time, it can greatly realize the autonomous adjustment of oil pressure by the hydraulic circuit of the equipment, thereby greatly increasing the service life of the oil circuit and hydraulic equipment.

[0053] According to some embodiments of the present application, please refer to Figures 1 to 9The present embodiment also relates to a hydraulic control system 100 for a compression garbage truck, comprising a main oil circuit 1, a main oil circuit module 2, a lifting oil circuit 3, a lifting module 4, a slide plate oil circuit 5, a slide plate module 6, a scraper oil circuit 7, a scraper module 8, a compression oil circuit 10, a compression module 9, a first reversing valve 11, a second reversing valve 12 and four pressure sensors; the main oil circuit 1 is provided with a main oil circuit module 2, the main oil circuit module 2 comprises an oil tank 21, a filter 22, a hydraulic pump 23 and a main overflow valve 24, the oil tank 21 is connected to the hydraulic pump 23 through the filter 22, and the main overflow valve 24 is connected to the hydraulic pump 23; the oil inlet of the lifting oil circuit 3 The oil inlet of the slide plate oil circuit 5 is connected to the oil outlet of the main oil circuit 1 through the first reversing valve 11, and the slide plate module 6 is provided on the slide plate oil circuit 5. The slide plate module 6 includes a slide plate stop valve 61 and a slide plate hydraulic assembly 62. The oil inlet of the slide plate stop valve 61 is connected to an oil outlet of the first reversing valve 11, and the oil outlet of the lift stop valve 41 is connected to the lift hydraulic assembly 42; the oil inlet of the slide plate oil circuit 5 is connected to the oil outlet of the main oil circuit 1 through the first reversing valve 11 and the second reversing valve 12, and the slide plate module 6 is provided on the slide plate oil circuit 5. The slide plate module 6 includes a slide plate stop valve 61 and a slide plate hydraulic assembly 62, and the oil inlet of the slide plate stop valve 61 is connected to the second An oil outlet of the reversing valve 12 is connected, and the oil outlet of the skateboard stop valve 61 is connected to the skateboard hydraulic component 62; the oil inlet of the scraper oil circuit 7 is connected to the oil outlet of the main oil circuit 1 through the first reversing valve 11 and the second reversing valve 12, and a scraper module 8 is provided on the scraper oil circuit 7. The scraper module 8 includes a scraper stop valve 81 and a scraper hydraulic component 82. The oil inlet of the scraper stop valve 81 is connected to the other oil outlet of the second reversing valve 12, and the oil outlet of the scraper stop valve 81 is connected to the scraper hydraulic component 82; the oil inlet of the scraper oil circuit 7 is connected to the oil outlet of the main oil circuit 1 through the first reversing valve 11, and the scraper oil circuit 7 is provided A compression module 9 is provided, and the compression module 9 includes a compression stop valve 91 and a compression hydraulic component 92. The oil inlet of the compression stop valve 91 is connected to the other oil outlet of the first reversing valve 11, and the oil outlet of the compression stop valve 91 is connected to the compression hydraulic component 92; four pressure sensors are respectively installed on the lifting oil circuit 3, the slide plate oil circuit 5, the scraper oil circuit 7 and the compression oil circuit 10, and the four pressure sensors are communicatively connected with the main overflow valve 24. The main overflow valve 24 is used to control the lifting stop valve 41 and / or the slide plate stop valve 61 and / or the scraper stop valve 81 and / or the compression stop valve 91 to cut off the corresponding oil circuit according to the pressure signal of the pressure sensor.

[0054] The first reversing valve 11 and the second reversing valve 12 are multi-way electromagnetic reversing valves.

[0055] The technical solution of the present application detects the real-time pressure changes of each oil circuit through a pressure sensor and sends it to the main controller of the main oil circuit 1. When the pressure of the hydraulic oil circuit exceeds the preset value, a pressure self-check is required. At this time, the main controller of the main oil circuit 1 will receive the abnormal pressure signal and remind the operator. At the same time, it will control the main relief valve 24 to adjust the pressure of the corresponding oil circuit to make the abnormal oil circuit pressure stable. If the equipment needs to be repaired or a sudden serious fault occurs, the main controller will send the instruction to the sub-controller of the faulty oil circuit, and the sub-controller will control the electromagnetic stop valve to emergency stop the oil circuit, and then complete the equipment maintenance. In this way, the compression work of the garbage truck can be completed efficiently, avoiding the compression work from stopping due to faults or equipment damage. At the same time, increasing the adaptive pressure can greatly realize the autonomous adjustment of the oil pressure of the hydraulic circuit of the equipment, greatly increasing the service life of the oil circuit and components.

[0056] According to some embodiments of the present application, optionally, Figure 1 , Figure 3 , Figure 7 , Figure 8 and Fig. 9 As shown, the lifting hydraulic assembly 42 includes a lifting reversing valve 421, a lifting cylinder 422 and a two-way hydraulic lock 423, the oil inlet of the two-way hydraulic lock 423 is connected to the oil outlet of the lifting stop valve 41, and the oil outlet of the two-way hydraulic lock 423 is connected to the lifting cylinder 422 through the lifting reversing valve 421.

[0057] The lifting module 4 is controlled by the lifting reversing valve 421, and the hydraulic pump 23 supplies oil to the lifting module 4, and the lifting module 4 starts to rise and fall. The lifting reversing valve 421 is a three-position four-way electromagnetic reversing valve.

[0058] The two-way hydraulic lock 423 refers to two hydraulically controlled one-way valves forming a two-way hydraulic lock 423. The principle is that the two hydraulically controlled one-way valves take the pressure of the other side's oil circuit as the pilot oil. When one side of the pipeline has no pressure, the other side is closed at the same time. Figure 7 As shown, at this time, the four ports A, B, C, and D are all blocked, the hydraulic oil circuit is locked, and the upper and lower bidirectional blocks are achieved. This is a protective measure to prevent the hydraulic telescopic rod from tipping over when lifting the trash bin or the telescopic rod from shrinking downward due to gravity. Figure 8 As shown, at this time, the lock core moves to the left, C and D are connected to the same branch oil circuit, A and C ports are connected, B and D ports are connected, and the hydraulic oil flows from the main oil circuit 1 to the lifting module 4. Fig. 9 As shown, at this time, the lock core moves to the right, C and D are connected to the same branch oil circuit, A and C ports are connected, B and D ports are connected, and the hydraulic oil flows from the main oil circuit 1 to the lifting module 4. Figure 8 and Fig. 9The difference lies in which one-way valve the oil supply port is connected to. If it is connected to port D, although ports D and C are connected in parallel, the oil pressure at port D will be slightly greater than that at port C, so the valve core moves to the left. Conversely, if it is connected to port C, although ports C and D are connected in parallel, the oil pressure at port C will be slightly greater than that at port D, so the valve core moves to the right.

[0059] In this way, the hydraulic pump 23 pumps oil, the hydraulic oil flows through the control of the first reversing valve 11, passes through the two-way hydraulic lock 423 and the lifting reversing valve 421, and finally reaches the lifting cylinder 422. The lifting frame rises and the garbage is tilted backward and introduced into the rear box of the garbage truck.

[0060] According to some embodiments of the present application, optionally, Figure 1 and Figure 4 As shown, the slide plate hydraulic assembly 62 includes a slide plate reversing valve 621 and a slide plate cylinder 622 , the oil inlet of the slide plate reversing valve 621 is connected to the oil outlet of the slide plate stop valve 61 , and the oil outlet of the slide plate reversing valve 621 is connected to the slide plate cylinder 622 .

[0061] The slide module 6 is controlled by the slide reversing valve 621. The hydraulic pump 23 supplies oil to the slide module 6, and the slide module 6 extends out of the slide. The slide reversing valve 621 is a three-position four-way electromagnetic reversing valve.

[0062] In this way, the hydraulic oil is pumped by the hydraulic pump 23, flows through the control of the first reversing valve 11 and the second reversing valve 12, passes through the slide plate reversing valve 621, and finally reaches the slide plate cylinder 622. The slide plate extends out and is ready to compress the garbage in the garbage truck.

[0063] According to some embodiments of the present application, optionally, Figure 1 and Figure 4 As shown, the skateboard hydraulic assembly 62 also includes a third reversing valve 623 and a skateboard standby reversing valve 624. The oil inlet of the third reversing valve 623 is connected to the oil outlet of the skateboard stop valve 61, and the oil outlet of the third reversing valve 623 is respectively connected to the oil inlets of the skateboard reversing valve 621 and the skateboard standby reversing valve 624. The oil outlets of the skateboard reversing valve 621 and the skateboard standby reversing valve 624 are both connected to the skateboard cylinder 622.

[0064] The third reversing valve 623 is a two-position three-way electromagnetic reversing valve, and the slide standby reversing valve 624 is a three-position four-way electromagnetic reversing valve. The slide cylinder 622 returns oil through the slide reversing valve 621 and the slide standby reversing valve 624, and the return oil ports of the slide reversing valve 621 and the slide standby reversing valve 624 are connected to the oil tank 21.

[0065] In this way, by setting the skateboard spare reversing valve 624 as a spare reversing valve, when the skateboard reversing valve 621 fails, it can be switched to the skateboard spare reversing valve 624, so that the skateboard cylinder 622 can start the extension and retraction work normally, thereby ensuring the compression efficiency.

[0066] According to some embodiments of the present application, optionally, Figure 1 and Figure 5 As shown, the scraper hydraulic assembly 82 includes a scraper reversing valve 821 and a scraper oil cylinder 822 . The oil inlet of the scraper reversing valve 821 is connected to the oil outlet of the scraper stop valve 81 , and the oil outlet of the scraper reversing valve 821 is connected to the scraper oil cylinder 822 .

[0067] The scraper module 8 is controlled by a scraper reversing valve 821. The hydraulic pump 23 supplies oil to the scraper module 8, and the scraper module 8 rotates the scraper. The scraper reversing valve 821 is a three-position four-way electromagnetic reversing valve.

[0068] In this way, the hydraulic pump 23 pumps oil, and the hydraulic oil flows through the control of the first reversing valve 11 and the second reversing valve 12, passes through the scraper reversing valve 821, and finally reaches the scraper cylinder 822. The scraper extends to scrape and discharge the garbage in the rear box of the compression garbage truck.

[0069] According to some embodiments of the present application, optionally, Figure 1 and Figure 5 As shown, the scraper hydraulic assembly 82 also includes a fourth reversing valve 823 and a scraper standby reversing valve 824. The oil inlet of the fourth reversing valve 823 is connected to the oil outlet of the scraper stop valve 81, and the oil outlet of the fourth reversing valve 823 is respectively connected to the oil inlets of the scraper reversing valve 821 and the scraper standby reversing valve 824. The oil outlets of the scraper reversing valve 821 and the scraper standby reversing valve 824 are both connected to the scraper cylinder 822.

[0070] The fourth reversing valve 823 is a two-position three-way electromagnetic reversing valve, and the scraper standby reversing valve 824 is a three-position four-way electromagnetic reversing valve. The scraper oil cylinder 822 returns oil through the scraper reversing valve 821 and the scraper standby reversing valve 824, and the return oil ports of the scraper reversing valve 821 and the scraper standby reversing valve 824 are connected to the oil tank 21.

[0071] In this way, by setting the scraper backup reversing valve 824 as a backup reversing valve, when the scraper reversing valve 821 fails, it can be switched to the scraper backup reversing valve 824, so that the scraper cylinder 822 can start the extension and retraction work normally, thereby ensuring the compression efficiency.

[0072] According to some embodiments of the present application, optionally, Figure 1 and Figure 6As shown, the compression hydraulic assembly 92 includes a speed regulating valve 921, a compression reversing valve 922, an air compressor 923, an air filter 924 and a boost cylinder 925; the oil inlet of the speed regulating valve 921 is connected to the oil outlet of the compression stop valve 91, the oil outlet of the speed regulating valve 921 is connected to the boost cylinder 925 through the compression reversing valve 922, the air compressor 923 is connected to the boost cylinder 925 through the air filter 924, and the air compressor 923 is used to provide compressed air to the boost cylinder 925.

[0073] The air compressor 923 provides compressed air to the boost cylinder 925, the speed regulating valve 921 adjusts the flow rate of the boost cylinder 925, supplies oil to the boost cylinder 925, the compression module 9 is controlled by the compression reversing valve 922, the hydraulic pump 23 supplies oil to the compression module 9, and the compression module 9 starts to compress the garbage. In some embodiments, the compression hydraulic assembly 92 also includes an air reversing valve 929, which is arranged between the air filter 924 and the boost cylinder 925, and the air reversing valve 929 is used to control the direction, on / off and air pressure of the gas flow.

[0074] In this way, the hydraulic oil is pumped by the hydraulic pump 23, and the hydraulic oil flows through the control of the first reversing valve 11, passes through the compression reversing valve 922, and finally reaches the booster cylinder 925, and the push plate moves to complete the compression of the garbage in the garbage truck.

[0075] According to some embodiments of the present application, optionally, Figure 1 and Figure 6 As shown, the compression hydraulic assembly 92 also includes a fifth reversing valve 926 and a compression standby reversing valve 927. The oil inlet of the fifth reversing valve 926 is connected to the oil outlet of the compression stop valve 91, and the oil outlet of the fifth reversing valve 926 is respectively connected to the oil inlets of the compression reversing valve 922 and the compression standby reversing valve 927. The oil outlets of the compression reversing valve 922 and the compression standby reversing valve 927 are both connected to the boost cylinder 925.

[0076] Among them, the fifth reversing valve 926 is a two-position three-way electromagnetic reversing valve, and the compression standby reversing valve 927 is a three-position four-way electromagnetic reversing valve.

[0077] In this way, by setting the compression standby reversing valve 927 as a standby reversing valve, when the compression reversing valve 922 fails, it can be switched to the compression standby reversing valve 927, so that the boost cylinder 925 can start compression work normally and ensure compression efficiency.

[0078] According to some embodiments of the present application, optionally, Figure 1 and Figure 6 As shown, the compression hydraulic assembly 92 further includes a relief valve 928 , and the oil return ports of the compression reversing valve 922 and the compression standby reversing valve 927 are connected to the oil tank 21 via the relief valve 928 .

[0079] The boost cylinder 925 returns oil through the compression reversing valve 922 and the compression standby reversing valve 927, and the return oil ports of the compression reversing valve 922 and the compression standby reversing valve 927 are connected to the oil tank 21 through the unloading relief valve 928. Optionally, the unloading relief valve 928 returns oil to the oil tank 21 after filtering through the filter 22. In this way, the unloading relief valve 928 is provided to facilitate emergency unloading and pressure relief of the boost cylinder 925.

[0080] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A hydraulic control system for a compression garbage truck, characterized in that: It includes a main oil circuit, a main oil circuit module, a lifting oil circuit, a lifting module, a slide plate oil circuit, a slide plate module, a scraper oil circuit, a scraper module, a compression oil circuit, a compression module, a first reversing valve, a second reversing valve and four pressure sensors; The main oil circuit is provided with the main oil circuit module, and the main oil circuit module includes an oil tank, a filter, a hydraulic pump and a main overflow valve, the oil tank is connected with the hydraulic pump through the filter, and the main overflow valve is connected with the hydraulic pump; The oil inlet of the lifting oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve, the lifting oil circuit is provided with the lifting module, the lifting module includes a lifting stop valve and a lifting hydraulic assembly, the oil inlet of the lifting stop valve is connected to an oil outlet of the first reversing valve, and the oil outlet of the lifting stop valve is connected to the lifting hydraulic assembly; The oil inlet of the slide oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve and the second reversing valve. The slide oil circuit is provided with the slide module. The slide module includes a slide stop valve and a slide hydraulic assembly. The oil inlet of the slide stop valve is connected to an oil outlet of the second reversing valve, and the oil outlet of the slide stop valve is connected to the slide hydraulic assembly. The oil inlet of the scraper oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve and the second reversing valve. The scraper module is arranged on the scraper oil circuit. The scraper module includes a scraper stop valve and a scraper hydraulic assembly. The oil inlet of the scraper stop valve is connected to the other oil outlet of the second reversing valve, and the oil outlet of the scraper stop valve is connected to the scraper hydraulic assembly. The oil inlet of the scraper oil circuit is connected to the oil outlet of the main oil circuit through the first reversing valve, the compression module is arranged on the scraper oil circuit, the compression module comprises a compression stop valve and a compression hydraulic component, the oil inlet of the compression stop valve is connected to the other oil outlet of the first reversing valve, and the oil outlet of the compression stop valve is connected to the compression hydraulic component; The four pressure sensors are respectively installed on the lifting oil circuit, the slide plate oil circuit, the scraper oil circuit and the compression oil circuit. The four pressure sensors are communicatively connected with the main overflow valve. The main overflow valve is used to control the lifting stop valve and / or the slide plate stop valve and / or the scraper stop valve and / or the compression stop valve to cut off the corresponding oil circuit according to the pressure signal of the pressure sensor.

2. The hydraulic control system for a compression garbage truck according to claim 1, characterized in that: The lifting hydraulic assembly includes a lifting reversing valve, a lifting cylinder and a two-way hydraulic lock, the oil inlet of the two-way hydraulic lock is connected to the oil outlet of the lifting stop valve, and the oil outlet of the two-way hydraulic lock is connected to the lifting cylinder through the lifting reversing valve.

3. The hydraulic control system for a compression garbage truck according to claim 1, characterized in that: The slide plate hydraulic assembly comprises a slide plate reversing valve and a slide plate oil cylinder. The oil inlet of the slide plate reversing valve is connected to the oil outlet of the slide plate stop valve, and the oil outlet of the slide plate reversing valve is connected to the slide plate oil cylinder.

4. The hydraulic control system for a compression garbage truck according to claim 3, characterized in that: The skateboard hydraulic assembly also includes a third reversing valve and a skateboard standby reversing valve. The oil inlet of the third reversing valve is connected to the oil outlet of the skateboard stop valve. The oil outlet of the third reversing valve is respectively connected to the oil inlets of the skateboard reversing valve and the skateboard standby reversing valve. The oil outlets of the skateboard reversing valve and the skateboard standby reversing valve are both connected to the skateboard cylinder.

5. The hydraulic control system for a compression garbage truck according to claim 1, characterized in that: The scraper hydraulic assembly includes a scraper reversing valve and a scraper oil cylinder. The oil inlet of the scraper reversing valve is connected to the oil outlet of the scraper stop valve, and the oil outlet of the scraper reversing valve is connected to the scraper oil cylinder.

6. The hydraulic control system for a compression garbage truck according to claim 5, characterized in that: The scraper hydraulic assembly also includes a fourth reversing valve and a scraper backup reversing valve. The oil inlet of the fourth reversing valve is connected to the oil outlet of the scraper stop valve. The oil outlet of the fourth reversing valve is respectively connected to the oil inlets of the scraper reversing valve and the scraper backup reversing valve. The oil outlets of the scraper reversing valve and the scraper backup reversing valve are both connected to the scraper cylinder.

7. The hydraulic control system for a compression garbage truck according to claim 1, characterized in that: The compression hydraulic assembly includes a speed regulating valve, a compression reversing valve, an air compressor, an air filter and a boost cylinder; The oil inlet of the speed regulating valve is connected to the oil outlet of the compression cut-off valve, the oil outlet of the speed regulating valve is connected to the boosting cylinder through the compression reversing valve, the air compressor is connected to the boosting cylinder through the air filter, and the air compressor is used to provide compressed air to the boosting cylinder.

8. The hydraulic control system for a compression garbage truck according to claim 7, characterized in that: The compression hydraulic assembly also includes a fifth reversing valve and a compression standby reversing valve, the oil inlet of the fifth reversing valve is connected to the oil outlet of the compression stop valve, the oil outlet of the fifth reversing valve is respectively connected to the oil inlets of the compression reversing valve and the compression standby reversing valve, and the oil outlets of the compression reversing valve and the compression standby reversing valve are both connected to the boosting cylinder.

9. The hydraulic control system for a compression garbage truck according to claim 8, characterized in that: The compression hydraulic assembly further includes a load-relief valve, and the oil return ports of the compression reversing valve and the compression standby reversing valve are connected to the oil tank via the load-relief valve.

10. A compression garbage truck, characterized in that: The invention comprises a hydraulic control system for a compacting garbage truck as claimed in any one of claims 1 to 9.

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