A single pumping swing cylinder valve

Abstract

The present invention discloses a single-link pumping swing cylinder valve, which includes a valve body; a first switching valve cavity, which is arranged in the valve body, a first valve core that can reciprocate and axially move is matched in the first switching valve cavity, a pumping pilot solenoid valve is connected to the valve body, and the pumping pilot solenoid valve is used to control the action of the first valve core; a second switching valve cavity, which is arranged in the valve body, a second valve core that can reciprocate and axially move is matched in the second switching valve cavity, and a swing cylinder pilot solenoid valve is connected to the valve body, and the swing cylinder pilot solenoid valve is used to control the action of the second valve core, so that the second oil inlet is switched and connected with the third oil outlet or the fourth oil outlet; the first switching valve cavity or the second switching valve cavity is connected to the oil inlet end of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve respectively. The single-link pumping swing cylinder valve has a small size, a simple and compact structure, a low production cost, a fast switching oil supply response, and can provide sufficient space for the assembly of other accessories.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control systems for engineering machinery, in particular to a single-pumping swing cylinder valve. Background Art

[0002] In the field of engineering machinery and construction machinery, there are many equipment such as pump trucks, excavators, loaders, excavators, etc., which need to rely on cylinders to bear loads or perform actions, and the action of the cylinders is generally controlled by control valves; for example, when a pump truck is working, the pumping cylinder and the swing cylinder need to move alternately, and the alternating action between the pumping cylinders and the pumping cylinders and the alternating action between the pumping cylinders and the swing cylinders need to be controlled by the pumping main valve, that is, the pumping main valve controls the mortar pump to supply oil to the pumping cylinder or the swing cylinder, so as to realize the alternating action between the pumping cylinders and the pumping cylinders and the alternating action between the pumping cylinders and the swing cylinders.

[0003] The structures of the pumping main valve in the prior art include two types, one is a separate type and the other is an integrated type. The separate type is to assemble the electromagnetic switching valve on the outer wall of the pumping main valve, and the pumping main valve is connected to the electromagnetic switching valve through a pipeline; the integrated pumping main valve is to integrate the electromagnetic switching valve inside the pumping main valve. In the former, two or at least two electromagnetic switching valves are installed on the top of the base, which increases the volume of the entire pumping main valve, resulting in more installation restrictions, a more complex connection structure and inconvenient installation; furthermore, the distance between the electromagnetic switching valve and the oil outlet, oil return port and main oil inlet on the base is long, and the length of the oil path connecting the electromagnetic switching valve and each oil port is long, so that the oil flow resistance is large when the pumping main valve supplies oil, the oil pressure loss is high, the switching response is slow, and the oil outlet pressure is insufficient. The latter generally has a high-pressure switching valve cavity and a low-pressure switching valve cavity in its valve body, and the two oil outlets of the high-pressure switching valve cavity are respectively connected to the rodless cavity of the pumping cylinder, and the two oil outlets of the low-pressure switching valve cavity are respectively connected to the rod cavity of the pumping cylinder, and the pumping cylinder works alternately through the action of the valve stems in the high-pressure switching valve cavity and the low-pressure switching valve cavity. Similarly, the integrated swing cylinder valve of the prior art also has two switching valve cavities in its valve body, namely the high-pressure switching valve cavity and the low-pressure switching valve cavity, and the two oil outlets of the high-pressure switching valve cavity are respectively connected to the rodless cavity of the swing cylinder, and the two oil outlets of the low-pressure switching valve cavity are respectively connected to the rod cavity of the swing cylinder. The valve body of the integrated pumping main valve or the swing cylinder valve in the prior art is provided with two switching valve chambers. Especially when the pumping main valve and the swing cylinder main valve are integrated together, four switching valve chambers must be provided in the valve body. Therefore, the internal structure of the valve body is extremely complex and the production cost is high. The assembly space of other components inside the valve body, such as the on-off valve, the pressure relief valve, etc., is narrow, which is not convenient for installation and distribution. Moreover, the valve body is large in size and the structure is not compact enough. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide a single-pumping swing cylinder valve with small size, simple and compact structure, low production cost, fast switching oil supply response, and sufficient space for the assembly of other accessories.

[0005] The technical solution of the present invention is to provide a single pumping swing cylinder valve with the following structure:

[0006] A valve body is provided with a first oil inlet, a second oil inlet, a first oil return port and a second oil return port, and the valve body is provided with a first oil outlet and a second oil outlet connected to the rodless chamber oil port of the pumping cylinder group, and a third oil outlet and a fourth oil outlet connected to the rodless chamber oil port of the swing cylinder group;

[0007] A first switching valve chamber is arranged in the valve body, the first switching valve chamber is communicated with the first oil inlet, the first oil return port, the first oil outlet and the second oil outlet respectively, and a first valve core that can reciprocate axially move is matched in the first switching valve chamber, and a pumping pilot solenoid valve is connected to the valve body, and the pumping pilot solenoid valve is used to control the action of the first valve core, so that the first oil inlet is switched and connected with the first oil outlet or the second oil outlet;

[0008] A second switching valve chamber is arranged in the valve body, the second switching valve chamber is respectively connected with the second oil inlet, the second oil return port, the third oil outlet and the fourth oil outlet, and a second valve core that can reciprocate axially move is matched in the second switching valve chamber, and a swing cylinder pilot solenoid valve is connected to the valve body, and the swing cylinder pilot solenoid valve is used to control the action of the second valve core, so that the second oil inlet is switched and connected with the third oil outlet or the fourth oil outlet;

[0009] The first switching valve chamber or the second switching valve chamber is communicated with the oil inlet end of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve respectively.

[0010] Preferably, a first unloading valve is provided on the valve body, an oil inlet end of the first unloading valve is communicated with the first oil inlet port, and an oil outlet end of the first unloading valve is communicated with the first oil return port.

[0011] Preferably, a second unloading valve is provided on the valve body, an oil inlet end of the second unloading valve is communicated with the second oil inlet port, and an oil outlet end of the second unloading valve is communicated with the second oil return port.

[0012] Preferably, first end covers are connected to the valve bodies at both ends of the first switching valve cavity, and two control oil chambers are respectively provided between the two ends of the first valve core and the two first end covers: a first control oil chamber and a second control oil chamber; the pumping pilot solenoid valve has two control oil output ports: a first control oil output port and a second control oil output port, the first control oil output port is connected to the first control oil chamber through a first channel arranged in the valve body, and the second control oil output port is connected to the second control oil chamber through a second channel arranged in the valve body.

[0013] Preferably, second end covers are connected to the valve bodies at both ends of the second switching valve chamber, and two control oil chambers are respectively provided between the two ends of the second valve core and the two second end covers: a third control oil chamber and a fourth control oil chamber; the swing cylinder pilot solenoid valve has two control oil output ports: a third control oil output port and a fourth control oil output port, the third control oil output port is connected to the third control oil chamber through a third oil circuit provided in the valve body, and the fourth control oil output port is connected to the fourth control oil chamber through a fourth oil circuit provided in the valve body.

[0014] Preferably, a first elastic member is provided in each of the first control oil chamber and the second control oil chamber, one end of the first elastic member is connected to the end of the first valve core, and the other end of the first elastic member is connected to the inner wall of the first end cover; a second elastic member is provided in each of the third control oil chamber and the fourth control oil chamber, one end of the second elastic member is connected to the end of the second valve core, and the other end of the second elastic member is connected to the inner wall of the second end cover.

[0015] Preferably, a one-way valve is connected to the oil passage communicating between the second oil inlet and the second switching valve chamber.

[0016] Preferably, a third oil inlet is provided on the valve body, and the third oil inlet is connected to the second switching valve cavity, and the third oil inlet is respectively connected to the oil inlet ends of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve through the second switching valve cavity.

[0017] Preferably, the first switching valve cavity and the second switching valve cavity are arranged in parallel and are both located at the lower part of the valve body; the first oil inlet and the second oil inlet are both located above the first switching valve cavity and the second switching valve cavity.

[0018] Preferably, two oil pipelines are provided in the valve body: a first oil pipeline and a second oil pipeline, one end of the first oil pipeline is connected to the second switching valve chamber, and the other end of the first oil pipeline is connected to the oil inlet end of the pumping pilot solenoid valve; one end of the second oil pipeline is connected to the second switching valve chamber, and the other end of the second oil pipeline is connected to the oil inlet end of the swing cylinder pilot solenoid valve.

[0019] After adopting the above structure, the single-pumping swing cylinder valve of the present invention has the following advantages compared with the prior art:

[0020] Firstly, two switching valve chambers are integrated in the valve body of the single-unit pumping swing cylinder valve, namely the first switching valve chamber and the second switching valve chamber. The first valve core in the first switching valve chamber moves under the control of the pumping pilot solenoid valve, so that the first oil inlet is switched to the first oil outlet or the second oil outlet, so that the two groups of pumping cylinders connected to the first oil outlet and the second oil outlet work alternately; the second valve core in the second switching valve chamber moves under the control of the swing cylinder pilot solenoid valve, so that the second oil inlet is switched to the third oil outlet or the fourth oil outlet, so that The two groups of swing oil cylinders connected to the third oil outlet and the fourth oil outlet work alternately; the single pumping swing cylinder valve integrates only two switching oil chambers in the valve body to control the alternating operation of the two groups of pumping oil cylinders and the two groups of swing oil cylinders; that is, the first valve core in the first switching valve chamber reciprocates to control the alternating operation of the two groups of pumping oil cylinders, and the second valve core in the second switching valve chamber reciprocates to control the alternating operation of the two groups of swing oil cylinders, so there is no need to set low-pressure switching valve chambers for oil supply to the two groups of pumping oil cylinders and the two groups of swing oil cylinders in the valve body. Therefore, its internal structure is simple and the production cost is low.

[0021] Secondly, the single-link pumping swing cylinder valve only needs two switching valve chambers under the premise of satisfying the alternating operation of two groups of pumping cylinders and two groups of swing cylinders. It has high integration, is compact, light and small in size; and the first switching valve chamber and the second switching valve chamber are actually high-pressure switching valve chambers, which can be matched with cylinders with smaller diameters so that the cylinders can move and switch quickly, thereby improving the working efficiency of the pumping cylinders; the single-link pumping swing cylinder valve has improved working efficiency, so it can also meet the combined use of pumping cylinders and swing cylinders under high-pressure and high-load conditions.

[0022] Furthermore, the first switching valve chamber or the second switching valve chamber is connected to the oil inlet ends of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve respectively. Therefore, the hydraulic oil introduced into the first switching valve chamber or the second switching valve chamber can supply oil to the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve, so that the pumping pilot solenoid valve controls the movement of the first valve core, and the swing cylinder pilot solenoid valve controls the movement of the second valve core; compared with the prior art that requires additional control oil to be provided to the solenoid valve group that controls the movement of the valve core, the oil circuit length of the control oil is shortened, the response speed of the valve core is improved, and there is no need to connect the control oil pipe to the valve body, the degree of integration is higher, and a larger installation space is provided for the installation of other components, which is convenient for the distribution of other components.

[0023] In addition, the first unloading valve arranged on the valve body is used to ensure the pressure in the first switching valve cavity, and the second unloading valve is used to ensure the pressure in the second switching valve cavity. Under the action of the unloading valve, the pressure in the valve body quickly reaches the set maximum value, thereby ensuring the oil supply pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a single-pumping swing cylinder valve of the present invention.

[0025] Figure 2 It is a schematic structural diagram from another angle of a single-pumping swing cylinder valve of the present invention.

[0026] Figure 3 It is a transverse cross-sectional schematic diagram of two switching valve chambers of a single-pumping swing cylinder valve of the present invention.

[0027] Figure 4 It is a schematic diagram of the longitudinal cross-sectional structure of two switching valve chambers of a single-pumping swing cylinder valve of the present invention.

[0028] Figure 5 It is a schematic diagram of the longitudinal cross-sectional structure of a first switching valve chamber of a single-pumping swing cylinder valve of the present invention.

[0029] Figure 6 It is a schematic diagram of the longitudinal cross-sectional structure of a second switching valve chamber of a single-pumping swing cylinder valve of the present invention.

[0030] Figure 7 It is a schematic diagram of the control principle of a single-pumping swing cylinder valve of the present invention.

[0031] As shown in the figure:

[0032] 1. Valve body, 100. First oil inlet, 101. First oil return port, 102. Second oil inlet, 103. Second oil return port, 104. First oil outlet, 105. Second oil outlet, 106. Third oil outlet, 107. Fourth oil outlet, 108. Third oil inlet, 109. Third auxiliary oil passage, 110. Fourth auxiliary oil passage, 111. First oil passage, 112. Second oil passage, 113. Third Oil passage, 2, first switching valve chamber, 200, first chamber, 201, second chamber, 202, third chamber, 203, fourth chamber, 204, fifth chamber, 205, first end cover, 206, first control oil chamber, 207, second control oil chamber, 208, first elastic member, 209, first oil inlet P port, 210, first oil return T port, 211, first output A port, 212, first output B port, 3, second switching valve Cavity, 300, second end cover, 301, third control oil cavity, 302, fourth control oil cavity, 303, second elastic member, 304, second oil inlet P port, 305, second oil return T port, 306, second output A port, 307, second output B port, 4, first valve core, 400, first diaphragm, 401, second diaphragm, 402, third diaphragm, 403, fourth diaphragm, 5, second valve core, 6, pumping pilot solenoid valve, 600, swing cylinder pilot solenoid valve, 601, first control oil output port, 602, second control oil output port, 603, first channel, 604, second channel, 605, third control oil output port, 606, fourth control oil output port, 607, third channel, 608, fourth channel, 7, first unloading valve, 700, second unloading valve, 8, first oil pipeline, 800, second oil pipeline, 9, one-way valve. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] See also Figure 1 to Figure 7 As shown;

[0035] The present embodiment discloses a single-unit pumping swing cylinder valve, which is connected to a machine such as a pump truck and is used to control the alternating operation of a pumping cylinder group, the alternating operation of a swing cylinder group, and the alternating operation of a pumping cylinder group and a swing cylinder group. In the present embodiment, a first oil inlet 100, a second oil inlet 102 and a third oil inlet 108 which are respectively connected to an external oil source are provided on the valve body 1; and a first oil outlet 104 and a second oil outlet 105 which are connected to the rodless chamber oil port of the pumping cylinder group and a third oil outlet 106 and a fourth oil outlet 107 which are connected to the rodless chamber oil port of the swing cylinder group are provided on the valve body 1, that is, the first oil outlet 104 and the second oil outlet 105 are respectively connected to the rodless chamber oil ports of two pumping cylinders in the pumping cylinder group through pipelines, and the third oil outlet 106 and the fourth oil outlet 107 are respectively connected to the rodless chamber oil ports of two swing cylinders in the swing cylinder group through pipelines. In order for the oil cylinder to respond quickly, the hydraulic oil entering the oil port of the rodless chamber of the oil cylinder is generally at a high pressure, and can quickly fill the rodless chamber of the oil cylinder. Therefore, in this embodiment, the oil output from the first oil outlet 104, the second oil outlet 105, the third oil outlet 106 and the fourth oil outlet 107 are all high-pressure oil. The valve body 1 is also provided with a first oil return port 101 and a second oil return port 103, and the first oil return port 101 and the second oil return port 103 are both connected to the external oil tank through a pipeline.

[0036] A first switching valve chamber 2 and a second switching valve chamber 3 are provided in the valve body 1. The first switching valve chamber 2 and the second switching valve chamber 3 are arranged in parallel and are both located at the lower part of the valve body 1. The oil of the first oil inlet 100 enters the first switching valve chamber 2 through the oil passage. The pumping pilot solenoid valve 6 connected to the valve body 1 controls the reciprocating axial movement of the first valve core 4 in the first switching valve chamber 2, thereby distributing the oil of the first oil inlet 100 to the first oil outlet 104 and the second oil outlet 105. Specifically, the first switching valve chamber 2 is connected to the first oil inlet 100, the first oil return port 101, the first oil outlet 104 and the second oil outlet 105, respectively. The oil outlet 105 is connected, and a first valve core 4 that can move axially back and forth is matched in the first switching valve chamber 2. The first valve core 4 moves axially back and forth under the control of the pumping pilot solenoid valve 6, so that the first oil inlet 100 is connected to the first oil outlet 104 for oil supply, and the second oil outlet 105 is connected to the first oil return port 101 for oil return, or the first oil inlet 100 is connected to the second oil outlet 105 for oil supply, and the first oil outlet 104 is connected to the first oil return port 101 for oil return, thereby realizing intermittent oil supply between the first oil outlet 104 and the second oil outlet 105, so that the pumping cylinder group works alternately. The oil from the second oil inlet 102 enters the second switching valve chamber 3 through the oil passage, and the swing cylinder pilot solenoid valve 600 connected to the valve body 1 controls the reciprocating axial movement of the second valve core 5 in the second switching valve chamber 3, thereby distributing the oil from the second oil inlet 102 to the third oil outlet 106 and the fourth oil outlet 107; specifically, the second switching valve chamber 3 is connected to the second oil inlet 102, the second oil return port 103, the third oil outlet 106 and the fourth oil outlet 107, respectively, and the second switching valve chamber 3 is equipped with a reciprocating axial The movable second valve core 5 moves axially back and forth under the control of the swing cylinder pilot solenoid valve 600, so that the second oil inlet 102 is connected to the third oil outlet 106 for oil supply, and the fourth oil outlet 107 is connected to the second oil return port 103 for oil return, or the second oil inlet 102 is connected to the fourth oil outlet 107 for oil supply, and the third oil outlet 106 is connected to the second oil return port 103 for oil return, thereby realizing intermittent oil supply to the first oil outlet 104 and the second oil outlet 105, so that the swing cylinder group works alternately.

[0037] See also Figure 7As shown, in the present embodiment, the first switching valve chamber 2 has a first oil inlet P port 209, a first oil return T port 210, a first output A port 211 and a first output B port 212, the first oil inlet P port 209 is connected to the first oil inlet 100 via a first oil path channel 111 arranged in the valve body 1, the first oil return T port 210 is connected to the first oil return port 101, the first output A port 211 is connected to the first oil outlet 104 via a second oil path channel 112 arranged in the valve body 1, and the first output B port 212 is connected to the second oil outlet 105 via a third oil path channel 113 arranged in the valve body 1; the first oil inlet 100 is fed with oil and the pumping pilot solenoid valve 6 controls the action of the first valve core 4, so that the first oil inlet 100 is switched and connected with the first output A port 211 or the first output B port 212, so that the first oil outlet 104 and the second oil outlet 105 are alternately supplied with oil. The second switching valve chamber 3 has a second oil inlet P port 304, a second oil return T port 305, a second output A port 306 and a second output B port 307. The second oil inlet P port 304 is connected to the second oil inlet 102 via a fourth oil circuit channel arranged in the valve body 1, the second oil return T port 305 is connected to the second oil return port 103, the second output A port 306 is connected to the third oil outlet 106 via a fifth oil circuit channel arranged in the valve body 1, and the second output B port 307 is connected to the fourth oil outlet 107 via a sixth oil circuit channel arranged in the valve body 1; the second oil inlet 102 is supplied with oil and the swing cylinder pilot solenoid valve 600 controls the action of the second valve core 5, so that the second oil inlet 102 is switched and connected with the second output A port 306 or the second output B port 307, so that the third oil outlet 106 and the fourth oil outlet 107 are alternately supplied with oil.

[0038] In this embodiment, the technical means for how the first valve core 4 operates in the first switching valve chamber 2 to alternately supply oil to the first oil outlet 104 and the second oil outlet 105 and how the second valve core 5 operates in the second switching valve chamber 3 to alternately supply oil to the third oil outlet 106 and the fourth oil outlet 107 are existing technical means. Figure 5 As shown and refer to the attached Figure 5In the embodiment shown, only the first valve core 4 is listed as the first switching valve chamber 2 to realize the alternating oil supply of the first oil outlet 104 and the second oil outlet 105 as follows: the first valve chamber is provided with an annularly recessed fifth chamber 204, a third chamber 202, a first chamber 200, a second chamber 201 and a fourth chamber 203 from left to right; the first valve core 4 is provided with a first diaphragm 400, a second diaphragm 401, a third diaphragm 402 and a fourth diaphragm 403 from left to right, the first The septum 400 is located between the fifth cavity 204 and the third cavity 202 and separates the fifth cavity 204 from the third cavity 202. The second septum 401 is located between the third cavity 202 and the first cavity 200 and separates the third cavity 202 from the first cavity 200. The third septum 402 is located between the first cavity 200 and the second cavity 201 and separates the first cavity 200 and the second cavity 201. The fourth septum 403 is located between the second cavity 201 and the fourth cavity 203 and separates the second cavity 201 from the fourth cavity 201. 3 separation; the first chamber 200 is connected with the first oil inlet 100, the first oil inlet P port 209 and the first oil passage 111, the third chamber 202 is connected with the second oil outlet 105 through the first output B port 212 and the third oil passage 113, and the second chamber 201 is connected with the first oil outlet 104 through the first output A port 211 and the second oil passage 112; when the first valve core 4 moves from left to right, the second diaphragm 401 is located between the first chamber 200 and the second chamber 201. The third chamber 202 is connected to the first chamber 200, and the oil flowing into the first switching valve chamber 2 from the first oil inlet P port 209 is outputted through the second oil outlet 105. At the same time, due to the separation effect of the second diaphragm 401 between the first chamber 200 and the second chamber 201, the oil flowing into the first switching valve chamber 2 from the first oil inlet P port 209 will not flow into the first oil outlet 104; on the contrary, when the first valve core 4 moves from right to left, the first oil outlet 104 supplies oil, and the second oil outlet 105 stops supplying oil, and so on, and the oil is supplied alternately. The second valve core 5 operates in the second switching valve chamber 3 to realize the alternate supply of oil to the third oil outlet 106 and the fourth oil outlet 107, which is the same as the above, and will not be described in detail in this embodiment.

[0039] See again Figure 3As shown, a first auxiliary oil passage and a second auxiliary oil passage are provided in the valve body 1, and the first auxiliary oil passage and the second auxiliary oil passage are symmetrically arranged about the center of the first switching valve chamber 2, and one end of the first auxiliary oil passage and the second auxiliary oil passage intersect in the first oil passage 111, and the other ends of the first auxiliary oil passage and the second auxiliary oil passage are respectively connected with the first switching valve chamber 2; in this way, the oil entering the first oil passage 111 through the first oil inlet 100 can not only enter the first switching valve chamber 2 through the first oil inlet P port 209, but also enter the first switching valve chamber 2 through the first auxiliary oil passage and the second auxiliary oil passage, thereby ensuring that there is enough oil in the first switching valve chamber 2, so that the oil pressure in the first switching valve chamber 2 is established faster, and ensuring that the pressure of the oil output from the first output A port 211 and the first output B port 212 is increased, so that the oil can quickly enter the rodless chamber of the pumping cylinder, so that the pumping cylinder can quickly move and switch, and the working efficiency of the pumping cylinder is improved.

[0040] See again Figure 6 As shown, a third auxiliary oil passage 109 and a fourth auxiliary oil passage 110 are provided in the valve body 1, and the third auxiliary oil passage 109 and the fourth auxiliary oil passage 110 are symmetrically arranged about the center of the second switching valve chamber 3, and one end of the third auxiliary oil passage 109 and the fourth auxiliary oil passage 110 intersect in the fourth oil passage, and the other ends of the third auxiliary oil passage 109 and the fourth auxiliary oil passage 110 are respectively connected to the second switching valve chamber 3; in this way, the oil entering the fourth oil passage from the second oil inlet 102 can not only enter the second switching valve chamber 3 through the second oil inlet P port 304, but also enter the second switching valve chamber 3 through the third auxiliary oil passage 109 and the fourth auxiliary oil passage 110, thereby ensuring that there is enough oil in the second switching valve chamber 3, so that the oil pressure in the second switching valve chamber 3 is established faster, and the pressure of the oil output from the second output A port 306 and the second output B port 307 is increased, so that the oil can quickly enter the rodless chamber of the swing cylinder, so that the swing cylinder can quickly move and switch, and the working efficiency of the swing cylinder is improved.

[0041] See also Figure 4As shown, the first switching valve chamber 2 and / or the second switching valve chamber 3 are respectively connected to the oil inlet ends of the pumping pilot solenoid valve 6 and the swing cylinder pilot solenoid valve 600. In this embodiment, the second switching valve chamber 3 is respectively connected to the oil inlet ends of the pumping pilot solenoid valve 6 and the swing cylinder pilot solenoid valve 600 through the oil pipeline. That is, the third oil inlet 108 on the valve body 1 is respectively connected to the oil inlet ends of the second switching valve chamber 3 and the pumping pilot solenoid valve 6 and the swing cylinder pilot solenoid valve 600 for oil supply. The hydraulic oil introduced into the first switching valve chamber 2 or the second switching valve chamber 3 can supply oil to the pumping pilot solenoid valve 6 and the swing cylinder pilot solenoid valve 600, so that the pumping pilot solenoid valve 6 controls the movement of the first valve core 4, and the swing cylinder pilot solenoid valve 600 controls the movement of the second valve core 5; in this embodiment, two oil pipelines are provided in the valve body 1: the first oil pipeline 8 and the second oil pipeline 800, one end of the first oil pipeline 8 is connected to the second switching valve chamber 3, and the other end of the first oil pipeline 8 is connected to the oil inlet end of the pumping pilot solenoid valve 6; one end of the second oil pipeline 800 is connected to the second switching valve chamber 3, and the other end of the second oil pipeline 800 is connected to the oil inlet end of the swing cylinder pilot solenoid valve 600. Compared with the prior art that requires additional control oil to be provided to the solenoid valve group that controls the movement of the valve core, the oil path length of the control oil is shortened, the response speed of the valve core is improved, and there is no need to connect the control oil pipe to the valve body 1, and the degree of integration is higher, providing a larger installation space for the installation of other components, and facilitating the distribution of other components.

[0042] See again Figure 1 and Figure 7 As shown, the valve body 1 is provided with a first unloading valve 7, the oil inlet end of the first unloading valve 7 is connected to the first oil inlet port 100, and the oil outlet end of the first unloading valve 7 is connected to the first oil return port 101. The valve body 1 is provided with a second unloading valve 700, the oil inlet end of the second unloading valve 700 is connected to the second oil inlet port 102, and the oil outlet end of the second unloading valve 700 is connected to the second oil return port 103. The first unloading valve 7 provided on the valve body 1 is used to ensure the pressure in the first switching valve cavity 2, and the second unloading valve 700 is used to ensure the pressure in the second switching valve cavity 3. Under the action of the unloading valve, the pressure in the valve body 1 quickly reaches the set maximum value, thereby ensuring the oil supply pressure.

[0043] The valve body 1 of the single-unit pumping swing cylinder valve of this embodiment has two switching valve chambers integrated in it, namely the first switching valve chamber 2 and the second switching valve chamber 3. The first valve core 4 in the first switching valve chamber 2 moves under the control of the pumping pilot solenoid valve 6, so that the first oil inlet 100 is switched and connected with the first oil outlet 104 or the second oil outlet 105, so that the two groups of pumping cylinders connected with the first oil outlet 104 and the second oil outlet 105 work alternately; the second valve core 5 in the second switching valve chamber 3 moves under the control of the swing cylinder pilot solenoid valve 600, so that the second oil inlet 102 is switched and connected with the third oil outlet 106 or the fourth oil outlet The oil port 107 is switched on, so that the two groups of swing cylinders connected to the third oil outlet 106 and the fourth oil outlet 107 work alternately; the single pumping swing cylinder valve integrates only two switching oil chambers in the valve body 1 to control the alternating work of the two groups of pumping cylinders and the two groups of swing cylinders; that is, the first valve core 4 in the first switching valve chamber 2 reciprocates to control the alternating work of the two groups of pumping cylinders, and the second valve core 5 in the second switching valve chamber 3 reciprocates to control the alternating work of the two groups of swing cylinders, so there is no need to set a low-pressure switching valve chamber for oil supply in the valve body 1 for the two groups of pumping cylinders and the two groups of swing cylinders. Therefore, its internal structure is simple and the production cost is low. Under the premise of satisfying the alternating work of the two groups of pumping cylinders and the two groups of swing cylinders, only two switching valve chambers are needed, which has high integration, is compact, light and small in size; it can be matched with a cylinder with a smaller diameter, so that the cylinder can move and switch quickly, and it can also meet the combined use of pumping cylinders and swing cylinders under high pressure and high load conditions.

[0044] See again Figure 3 , Figure 5 and Figure 6As shown, as an embodiment of the present invention; the valve body 1 at both ends of the first switching valve chamber 2 is connected to the first end cover 205, and two control oil chambers are respectively provided between the two ends of the first valve core 4 and the two first end covers 205: the first control oil chamber 206 and the second control oil chamber 207; the pumping pilot solenoid valve 6 has two control oil output ports: the first control oil output port 601 and the second control oil output port 602, the first control oil output port 601 is connected to the first control oil chamber 206 through a first channel 603 arranged in the valve body 1, and the second control oil output port 602 is connected to the second control oil chamber 207 through a second channel 604 arranged in the valve body 1. The second end covers 300 are connected to the valve bodies 1 at both ends of the second switching valve chamber 3, and two control oil chambers are respectively provided between the two ends of the second valve core 5 and the two second end covers 300: the third control oil chamber 301 and the fourth control oil chamber 302; the swing cylinder pilot solenoid valve 600 has two control oil output ports: the third control oil output port 605 and the fourth control oil output port 606, the third control oil output port 605 is connected to the third control oil chamber 301 through a third channel 607 arranged in the valve body 1, and the fourth control oil output port 606 is connected to the fourth control oil chamber 302 through a fourth channel 608 arranged in the valve body 1. The first control oil chamber 206 and the second control oil chamber 207 are both provided with a first elastic member 208, one end of which is connected to the end of the first valve core 4, and the other end of which is connected to the inner wall of the first end cover 205; the third control oil chamber 301 and the fourth control oil chamber 302 are both provided with a second elastic member 303, one end of which is connected to the end of the second valve core 5, and the other end of which is connected to the inner wall of the second end cover 300. The first control oil output port 601 of the pumping pilot solenoid valve 6 is connected to the first control oil chamber 206 through the first channel 603 provided in the valve body 1, and the second control oil output port 602 is connected to the second control oil chamber 207 through the second channel 604 provided in the valve body 1. The third control oil output port 605 of the swing cylinder pilot solenoid valve 600 is connected to the third control oil chamber 301 through the third channel 607 arranged in the valve body 1, and the fourth control oil output port 606 is connected to the fourth control oil chamber 302 through the fourth channel 608 arranged in the valve body 1; the first channel 603, the second channel 604, the third channel 607 and the fourth channel 608 are all integrated in the valve body 1, so that the integration of the valve body 1 is higher, the distance between the pumping pilot solenoid valve 6 and the first control oil chamber 206 and the second control oil chamber 207 is greatly shortened, and the distance between the swing cylinder pilot solenoid valve 600 and the third control oil chamber 301 and the fourth control oil chamber 302 is greatly shortened; thereby making the response speed of the first valve core 4 and the second valve core 5 faster.

[0045] See again Figure 7As shown, a one-way valve 9 is connected to the oil passage between the second oil inlet 102 and the second switching valve chamber 3. The setting of the one-way valve 9 further ensures the pressure buildup in the valve body 1, and also prevents the oil entering the third oil inlet 108 from flowing back to the second oil inlet 102.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings or in actual use, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", "fourth", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0047] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A single pumping swing cylinder valve, characterized in that: It includes A valve body is provided with a first oil inlet, a second oil inlet, a first oil return port and a second oil return port, the valve body is provided with a first oil outlet and a second oil outlet connected to the rodless chamber oil port of the pumping cylinder group, and a third oil outlet and a fourth oil outlet connected to the rodless chamber oil port of the swing cylinder group, the valve body is provided with a first oil passage connected to the first oil inlet and a fourth oil passage connected to the second oil inlet; A first switching valve chamber is arranged in the valve body, the first switching valve chamber is communicated with the first oil inlet, the first oil return port, the first oil outlet and the second oil outlet respectively, and a first valve core that can reciprocate axially is matched in the first switching valve chamber, and a pumping pilot solenoid valve is connected to the valve body, and the pumping pilot solenoid valve is used to control the action of the first valve core to switch the first oil inlet with the first oil outlet or the second oil outlet; and The valve body is provided with a first auxiliary oil passage and a second auxiliary oil passage, the first auxiliary oil passage and the second auxiliary oil passage are symmetrically arranged about the center of the first switching valve cavity, one end of the first auxiliary oil passage and the second auxiliary oil passage intersect in the first oil passage, and the other ends of the first auxiliary oil passage and the second auxiliary oil passage are respectively connected to the first switching valve cavity; and the oil entering the first oil passage from the first oil inlet can not only enter the first switching valve cavity, but also enter the first switching valve cavity through the first auxiliary oil passage and the second auxiliary oil passage; A second switching valve chamber is arranged in the valve body, the second switching valve chamber is communicated with the second oil inlet, the second oil return port, the third oil outlet and the fourth oil outlet respectively, and a second valve core that can reciprocate axially move is matched in the second switching valve chamber, and a swing cylinder pilot solenoid valve is connected to the valve body, and the swing cylinder pilot solenoid valve is used to control the action of the second valve core to switch the second oil inlet with the third oil outlet or the fourth oil outlet; and A third auxiliary oil passage and a fourth auxiliary oil passage are provided in the valve body, and the third auxiliary oil passage and the fourth auxiliary oil passage are symmetrically arranged about the center of the second switching valve chamber, and one end of the third auxiliary oil passage and the fourth auxiliary oil passage intersect in the fourth oil passage, and the other end of the third auxiliary oil passage and the fourth auxiliary oil passage are respectively communicated with the second switching valve chamber; and the oil entering the fourth oil passage from the second oil inlet can not only enter the second switching valve chamber, but also enter the second switching valve chamber through the third auxiliary oil passage and the fourth auxiliary oil passage; The first switching valve chamber or the second switching valve chamber is connected to the oil inlet end of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve respectively; two oil pipelines are arranged in the valve body: the first oil pipeline and the second oil pipeline, one end of the first oil pipeline is connected to the second switching valve chamber, and the other end of the first oil pipeline is connected to the oil inlet end of the pumping pilot solenoid valve; one end of the second oil pipeline is connected to the second switching valve chamber, and the other end of the second oil pipeline is connected to the oil inlet end of the swing cylinder pilot solenoid valve.

2. A single pumping swing cylinder valve according to claim 1, characterized in that: The valve body is provided with a first unloading valve, an oil inlet end of the first unloading valve is communicated with the first oil inlet port, and an oil outlet end of the first unloading valve is communicated with the first oil return port.

3. A single pumping swing cylinder valve according to claim 2, characterized in that: The valve body is provided with a second unloading valve, an oil inlet end of the second unloading valve is communicated with the second oil inlet port, and an oil outlet end of the second unloading valve is communicated with the second oil return port.

4. A single pumping swing cylinder valve according to claim 1, characterized in that: The valve bodies at both ends of the first switching valve chamber are connected to first end covers, and two control oil chambers are respectively provided between the two ends of the first valve core and the two first end covers: a first control oil chamber and a second control oil chamber; the pumping pilot solenoid valve has two control oil output ports: a first control oil output port and a second control oil output port, the first control oil output port is connected to the first control oil chamber through a first channel arranged in the valve body, and the second control oil output port is connected to the second control oil chamber through a second channel arranged in the valve body.

5. A single pumping swing cylinder valve according to claim 1 or 4, characterized in that: Second end covers are connected to the valve bodies at both ends of the second switching valve chamber, and two control oil chambers are respectively arranged between the two ends of the second valve core and the two second end covers: a third control oil chamber and a fourth control oil chamber; the swing cylinder pilot solenoid valve has two control oil output ports: a third control oil output port and a fourth control oil output port, the third control oil output port is connected to the third control oil chamber through a third channel arranged in the valve body, and the fourth control oil output port is connected to the fourth control oil chamber through a fourth channel arranged in the valve body.

6. A single pumping swing cylinder valve according to claim 5, characterized in that: A first elastic member is provided in each of the first control oil chamber and the second control oil chamber, one end of the first elastic member is connected to the end of the first valve core, and the other end of the first elastic member is connected to the inner wall of the first end cover; a second elastic member is provided in each of the third control oil chamber and the fourth control oil chamber, one end of the second elastic member is connected to the end of the second valve core, and the other end of the second elastic member is connected to the inner wall of the second end cover.

7. The single pumping swing cylinder valve according to claim 1, characterized in that: A one-way valve is connected to the oil passage communicating between the second oil inlet and the second switching valve chamber.

8. The single pumping swing cylinder valve according to claim 5, characterized in that: The valve body is provided with a third oil inlet, and the third oil inlet is communicated with the oil inlet ends of the pumping pilot solenoid valve and the swing cylinder pilot solenoid valve respectively.

9. The single pumping swing cylinder valve according to claim 1, characterized in that: The first switching valve chamber and the second switching valve chamber are arranged in parallel and are both located at the lower part of the valve body.

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