Integrated mortar pump control valve

Abstract

The present invention discloses an integrated mortar pump control valve, which includes a valve body, on which a main oil inlet, a main oil return port, a first oil outlet, a second oil outlet, a secondary oil return port, a third oil outlet, and a fourth oil outlet are arranged; a first switching valve cavity is respectively connected to the main oil inlet, the main oil return port, the first oil outlet, and the second oil outlet, and a first valve stem is matched with the clearance in the first switching valve cavity; a second switching valve cavity is respectively connected to the main oil inlet, the secondary oil return port, the third oil outlet, and the fourth oil outlet, and a second valve stem is matched with the clearance in the second switching valve cavity; a first solenoid valve group is used to drive the first valve stem to reciprocate in the first switching valve cavity; and a second solenoid valve group is used to drive the second valve stem to reciprocate in the second switching valve cavity. The integrated mortar pump control valve has a small size, a simple structure, and is easy to install, and has a short oil supply circuit, low oil flow resistance, low pressure loss, and fast switching oil supply response.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic control systems for engineering machinery, and in particular to an integrated mortar pump control valve. Background Art

[0002] In the field of engineering machinery and construction machinery, there are many equipment such as pump trucks, excavators, loaders, and double-ended excavators, 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 of the pumping cylinder and the swing cylinder needs to be controlled by a mortar pump control valve, that is, the control valve controls the mortar pump to supply oil to the pumping cylinder or the swing cylinder to achieve alternating action of the pumping cylinder or the swing cylinder. The structure of the mortar pump control valve in the prior art includes a base, on which is provided a main oil inlet connected to the mortar pump, an oil return port connected to the oil tank, a first oil outlet and a first oil return port connected to two oil ports of the pumping cylinder, and a second oil outlet and a second oil return port connected to the two oil ports of the swing cylinder; the top of the base is connected to a first solenoid switching valve and a second solenoid switching valve, the first solenoid switching valve controls the main oil inlet to supply oil to the first oil outlet of the pumping cylinder or the main oil inlet to supply oil to the first oil return port of the pumping cylinder, and the second solenoid switching valve controls the main oil inlet to supply oil to the first oil outlet of the swing cylinder or the main oil inlet to supply oil to the first oil return port of the swing cylinder. The mortar pump control valve of the existing technology has the following deficiencies in actual use: first, the two solenoid switching valves are installed on the top of the base, which increases the volume of the entire mortar pump control valve, resulting in more installation restrictions, a complex connection structure and inconvenient installation; secondly, the distance between the two solenoid switching valves and the oil outlet, oil return port and main oil inlet on the base is relatively long, resulting in a long oil path length connecting them, which makes the mortar pump control valve have a large oil flow resistance and high oil pressure loss when supplying oil, the switching response is slow, and the oil outlet pressure is insufficient. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned prior art and provide an integrated mortar pump control valve with small size, simple structure, easy installation, short oil supply circuit, low oil flow resistance, low pressure loss, and fast switching oil supply response.

[0004] The technical solution of the present invention is to provide an integrated mortar pump control valve having the following structure:

[0005] The valve body has a main oil inlet connected to the mortar pump, a main oil return port connected to the external oil tank, a first oil outlet connected to the first oil port of the first oil cylinder, and a second oil outlet connected to the second oil port of the first oil cylinder on its first end surface; a secondary oil return port connected to the external oil tank, a third oil outlet connected to the first oil port of the second oil cylinder, and a fourth oil outlet connected to the second oil port of the second oil cylinder on its second end surface;

[0006] A first switching valve chamber is arranged in the valve body, the first switching valve chamber is respectively connected with the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet, the clearance in the first switching valve chamber is matched with a first valve stem that can reciprocate, the first valve stem can make the main oil inlet communicate with the first oil outlet and the main oil return port communicate with the second oil outlet, or make the main oil inlet communicate with the second oil outlet and the main oil return port communicate with the first oil outlet;

[0007] A second switching valve chamber is arranged in the valve body, the second switching valve chamber is respectively connected with the main oil inlet, the secondary oil return port, the third oil outlet and the fourth oil outlet, the clearance in the second switching valve chamber is matched with a second valve stem that can reciprocate, and the second valve stem can make the main oil inlet communicate with the third oil outlet and the secondary oil return port communicate with the fourth oil outlet, or make the main oil inlet communicate with the fourth oil outlet and the secondary oil return port communicate with the third oil outlet;

[0008] A first solenoid valve group, connected to the valve body, for driving the first valve stem to reciprocate in the first switching valve chamber;

[0009] The second solenoid valve group is connected to the valve body and is used to drive the second valve stem to move back and forth in the second switching valve chamber.

[0010] As an improvement, an oil inlet and outlet interface for connecting an accumulator is also provided on the second end face of the valve body, and the oil inlet and outlet interface is connected to the oil circuit connecting the main oil inlet and the second switching valve chamber; when the main oil inlet supplies oil to the second switching valve chamber, the accumulator supplements the oil supply to the second switching valve chamber through the oil inlet and outlet interface.

[0011] Preferably, a first oil hole, a second oil hole, a third oil hole and a fourth oil hole connected to the first switching valve chamber are provided on the inner wall of the first switching valve chamber; the first oil hole and the main oil inlet, the second oil hole and the main oil return, the third oil hole and the first oil outlet, and the fourth oil hole and the second oil outlet are all connected through an oil passage.

[0012] Preferably, a fifth oil hole, a sixth oil hole, a seventh oil hole and an eighth oil hole connected to the second switching valve chamber are provided on the inner wall of the second switching valve chamber; the fifth oil hole and the main oil inlet, the sixth oil hole and the secondary oil return port, the seventh oil hole and the third oil outlet, and the eighth oil hole and the fourth oil outlet are all connected through an oil passage.

[0013] Preferably, the valve bodies at both ends of the first switching valve chamber are respectively connected with a first end cover and a second end cover, and the two ends of the first valve stem are respectively connected with a first elastic member, and the outer ends of the two first elastic members are respectively abutted against the inner walls of the first end cover and the second end cover, and the two first elastic members are used to keep the first valve stem in an initial state; a first oil chamber is provided in the first end cover, and a first control oil port connected to the first oil chamber is provided on the first end cover; a second oil chamber is provided in the second end cover, and a second control oil port connected to the second oil chamber is provided on the second end cover; the first solenoid valve group has a first control oil inlet, a first control oil return port, a first control oil outlet and a second control oil outlet; the first control oil inlet is connected to the main oil inlet, the first control oil return port is connected to the main oil return port, the first control oil outlet is connected to the first control oil port, and the second control oil outlet is connected to the second control oil port.

[0014] Preferably, a third end cover and a fourth end cover are respectively connected to the valve bodies at both ends of the second switching valve chamber, and a second elastic member is respectively connected to both ends of the second valve stem, and the outer ends of the two second elastic members are respectively abutted against the inner walls of the third end cover and the fourth end cover, and the two second elastic members are used to keep the second valve stem in an initial state; a third oil chamber is provided in the third end cover, and a third control oil port connected to the third oil chamber is provided on the third end cover; a fourth oil chamber is provided in the fourth end cover, and a fourth control oil port connected to the fourth oil chamber is provided on the fourth end cover; the second solenoid valve group has a second control oil inlet, a second control oil return port, a third control oil outlet and a fourth control oil outlet; the second control oil inlet is connected to the main oil inlet, the second control oil return port is connected to the secondary oil return port, the third control oil outlet is connected to the third control oil port, and the fourth control oil outlet is connected to the fourth control oil port.

[0015] Preferably, a one-way valve is connected to the oil circuit connecting the main oil inlet and the fifth oil hole, which allows the oil to flow from the main oil inlet to the fifth oil hole.

[0016] Preferably, the valve body is connected with an electromagnetic unloading valve, the oil inlet end of the electromagnetic unloading valve is communicated with the main oil inlet port, and the oil outlet end of the electromagnetic unloading valve is communicated with the main oil return port.

[0017] Preferably, the first solenoid valve group includes a first solenoid valve and a second solenoid valve, the first solenoid valve is used to control the oil to enter the second oil chamber through the second control oil port, so that the first valve stem moves to the side away from the second oil chamber; the second solenoid valve is used to control the oil to enter the first oil chamber through the first control oil port, so that the first valve stem moves to the side away from the first oil chamber.

[0018] Preferably, the second solenoid valve group includes a third solenoid valve and a fourth solenoid valve, the third solenoid valve is used to control the oil to enter the fourth oil chamber through the fourth control oil port, so that the second valve stem moves to the side away from the fourth oil chamber; the fourth solenoid valve is used to control the oil to enter the third oil chamber through the third control oil port, so that the second valve stem moves to the side away from the third oil chamber.

[0019] Preferably, a main oil circuit is provided between the main oil inlet and the first switching valve cavity to connect the two. The main oil circuit includes a horizontally arranged first section of the oil circuit and an inclinedly arranged second section of the oil circuit, and an arc section of the oil circuit is provided between the first section of the oil circuit and the second section of the oil circuit. The inner walls of the first section of the oil circuit, the arc section of the oil circuit and the second section of the oil circuit are smoothly transitioned, and the cross section of the main oil circuit is increased in sequence along the oil inlet direction of the main oil circuit. This arrangement enables the oil pumped to the main oil inlet by the mortar pump to quickly enter the first switching valve cavity through the main oil circuit, and further reduces the flow resistance of the oil in the main oil circuit, reducing the loss of oil pressure; as a further preference, the angle between the oil inlet direction of the first section of the oil circuit and the oil inlet direction of the second section of the oil circuit is 120 degrees to 145 degrees; this arrangement enables the oil in the first section of the oil circuit to quickly enter the first switching valve cavity through the second section of the oil circuit, further reducing the flow resistance of the oil in the main oil circuit, and reducing the loss of oil pressure.

[0020] After adopting the above structure, the integrated mortar pump control valve of the present invention has the following advantages compared with the prior art:

[0021] 1. The integrated mortar pump control valve integrates the first switching valve chamber, the first valve stem, the second switching valve chamber and the second valve stem in the valve body. When working, the mortar pump pumps oil to the main oil inlet, and the oil in the main oil inlet flows to the first switching valve chamber and the second switching valve chamber. The first solenoid valve group drives the first valve stem to reciprocate in the first switching valve chamber, so that the main oil inlet is connected to the first oil outlet and the main oil return port is connected to the second oil outlet, or the main oil inlet is connected to the second oil outlet and the main oil return port is connected to the first oil outlet; when the main oil inlet is connected to the first oil outlet and the main oil return port is connected to the second oil outlet, the first oil outlet flows to the first oil outlet. The first oil port of the oil cylinder supplies oil, the first oil cylinder acts, and the second oil port of the first oil cylinder returns oil to the second oil outlet, and the oil flows to the external oil tank through the second oil outlet and the main oil return port in sequence for storage; when the main oil inlet is connected with the second oil outlet and the main oil return port is connected with the first oil outlet, the second oil outlet supplies oil to the second oil port of the first oil cylinder, the first oil cylinder acts in the opposite direction, and the first oil port of the first oil cylinder returns oil to the first oil outlet, and the oil flows to the external oil tank through the first oil outlet and the main oil return port in sequence for storage; the first oil outlet and the second oil outlet alternately supply oil to the first cylinder under the switching action of the first valve stem to realize the reciprocating action of the first oil cylinder. In addition, the second solenoid valve group drives the second valve stem to reciprocate in the second switching valve chamber, so that the main oil inlet is connected to the third oil outlet and the secondary oil return port is connected to the fourth oil outlet, or the main oil inlet is connected to the fourth oil outlet and the secondary oil return port is connected to the third oil outlet; when the main oil inlet is connected to the third oil outlet and the secondary oil return port is connected to the fourth oil outlet, the third oil outlet supplies oil to the first oil outlet of the second oil cylinder, the second oil cylinder is actuated, and the second oil outlet of the second oil cylinder returns oil to the fourth oil outlet, and the oil passes through the first oil outlet of the second oil cylinder in sequence. The fourth oil outlet and the secondary oil return port flow to the external oil tank for storage; when the main oil inlet is connected with the fourth oil outlet and the secondary oil return port is connected with the third oil outlet, the fourth oil outlet supplies oil to the second oil port of the second oil cylinder, the second oil cylinder acts in the opposite direction, and the first oil port of the second oil cylinder returns oil to the third oil outlet, and the oil flows to the external oil tank for storage through the third oil outlet and the secondary oil return port in sequence; the third oil outlet and the fourth oil outlet alternately supply oil to the second oil cylinder under the switching action of the second valve stem to realize the reciprocating motion of the second oil cylinder. Since the first switching valve chamber, the first valve stem, the second switching valve chamber and the second valve stem are all integrated in the valve body, the oil path from the main oil inlet through the first switching valve chamber to the first oil outlet and the second oil outlet, as well as the oil path from the main oil inlet through the second switching valve chamber to the third oil outlet and the fourth oil outlet are both shorter, with low oil flow resistance and low pressure loss, and the switching from the first oil cylinder to the second oil cylinder or the switching of oil supply between the two oil ports of the first oil cylinder and the switching of oil supply between the two oil ports of the second oil cylinder all respond quickly, and the oil pressure loss flowing out of the first oil outlet, the second oil outlet, the third oil outlet and the fourth oil outlet is low, thereby meeting the oil inlet pressure requirements of the first oil cylinder and the second oil cylinder.Furthermore, the first switching valve chamber, the first valve stem, the second switching valve chamber and the second valve stem are all integrated in the valve body, so that the integrated mortar pump control valve has a small size, a simple structure, and is easy to install and assemble.

[0022] 2. The setting of the oil inlet and outlet interfaces on the second end face of the valve body allows the accumulator to be connected to the oil inlet and outlet interfaces, so that when the mortar pump supplies oil to the main oil inlet, a part of the oil enters the accumulator to store energy; when the main oil inlet switches from supplying oil to the first oil outlet or the second oil outlet to supplying oil to the third oil outlet or the fourth oil outlet, since the oil pressure has a certain loss, the oil in the accumulator is quickly supplied to the second switching valve chamber, and when the second solenoid valve group controls the movement of the second valve stem, the oil supply pressure of the third oil outlet or the fourth oil outlet is guaranteed, which in turn ensures the stability of the oil circuit pressure when the two cylinders are switched during operation, so that the oil supply stability of the integrated mortar pump control valve is high.

[0023] 3. A one-way valve is connected to the oil circuit connecting the main oil inlet and the fifth oil hole, which allows the oil to flow from the main oil inlet to the fifth oil hole. The one-way valve has a function of isolating pressure, that is, when the machine is shut down, the oil in the accumulator can only be supplied to the second switching valve chamber. Because the one-way valve is closed, the accumulator oil will not flow through the first switching valve chamber to unload. The setting of the one-way valve not only ensures the stability of the pressure in the second switching valve chamber, but also enables the oil in the accumulator to be quickly replenished to the second switching valve chamber. Moreover, the second switching valve chamber can also work for several cycles in the shutdown state, so that the delivery pipeline controlled by the second oil cylinder stops at the specified position, which is convenient for cleaning the delivery pipeline. In addition, the setting of the electromagnetic unloading valve facilitates the establishment of pressure in the integrated mortar pump control valve. Under the action of the electromagnetic unloading valve, the pressure in the valve body reaches the set maximum value, thereby ensuring the oil supply pressure.

[0024] 4. The first solenoid valve of the first solenoid valve group is used to control the oil to enter the second oil chamber through the second control oil port, and the second solenoid valve is used to control the oil to enter the first oil chamber through the first control oil port, so that the first valve stem is alternately controlled to move back and forth, and the first oil outlet and the second oil outlet are alternately supplied with oil; and the third solenoid valve of the second solenoid valve group is used to control the oil to enter the fourth oil chamber through the fourth control oil port, and the fourth solenoid valve is used to control the oil to enter the third oil chamber through the third control oil port, so that the second valve stem is alternately supplied with oil. Therefore, the structure of switching oil supply is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the integrated mortar pump control valve of the present invention.

[0026] Figure 2 It is a schematic structural diagram from another angle of the integrated mortar pump control valve of the present invention.

[0027] Figure 3 It is a schematic diagram of the longitudinal cross-sectional structure of the first switching valve chamber of the integrated mortar pump control valve of the present invention.

[0028] Figure 4 It is a schematic diagram of the longitudinal cross-sectional structure of the second switching valve chamber of the integrated mortar pump control valve of the present invention.

[0029] Figure 5 It is a schematic diagram of the control principle of the integrated mortar pump control valve of the present invention.

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the main oil inlet of the integrated mortar pump control valve of the present invention.

[0031] As shown in the figure:

[0032] 1. Valve body, 100. Main oil inlet, 101. Main oil return port, 102. First oil outlet, 103. Second oil outlet, 104. Oil inlet and outlet interface, 105. Secondary oil return port, 106. Third oil outlet, 107. Fourth oil outlet, 108. Second section oil circuit, 109. Arc section oil circuit, 110. First section oil circuit, 2. First switching valve chamber, 200. First valve stem, 201. First oil hole, 202. Second oil hole, 203. Third oil hole, 204. Fourth oil hole, 205. First end cover, 206. Second end cover, 207. First elastic member, 208. First oil chamber, 209. First control oil port, 210. Second oil chamber, 211. Second control oil port, 3. First solenoid valve group, 300. First solenoid valve, 301. Second solenoid valve , 302, the first control oil inlet, 303, the first control oil return port, 304, the first control oil outlet, 305, the second control oil outlet, 4, the second switching valve chamber, 400, the second valve stem, 401, the fifth oil hole, 402, the sixth oil hole, 403, the seventh oil hole, 404, the eighth oil hole, 405, the third end cover, 406, the fourth end cover, 407, the second elastic member, 408, the third oil chamber, 409, the third control oil port, 410, the fourth oil chamber, 411, the fourth control oil port, 5, the second solenoid valve group, 500, the third solenoid valve, 501, the fourth solenoid valve, 502, the second control oil inlet, 503, the second control oil return port, 504, the third control oil outlet, 505, the fourth control oil outlet, 6, the one-way valve, 7, the electromagnetic unloading 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 6 As shown;

[0035] The present invention discloses an integrated mortar pump control valve, which is connected to a pump truck and a mortar pump, and is used to input the oil of the mortar pump into a first cylinder and a second cylinder to control the alternating movements of the first cylinder and the second cylinder. In this embodiment, the first cylinder refers to the pumping cylinder, and the second cylinder refers to the swing cylinder. The integrated mortar pump control valve comprises a valve body 1, on the first end face of which a main oil inlet 100 connected to the mortar pump, a main oil return port 101 connected to the external oil tank, a first oil outlet 102 connected to the first oil port of the first oil cylinder, and a second oil outlet 103 connected to the second oil port of the first oil cylinder are provided; on the second end face of the valve body 1, a secondary oil return port 105 connected to the external oil tank, a third oil outlet 106 connected to the first oil port of the second oil cylinder, and a fourth oil outlet 107 connected to the second oil port of the second oil cylinder are provided; when the integrated mortar pump control valve is in use, the oil outlet of the mortar pump is connected to the main oil inlet through a pipeline, the first oil port of the first oil cylinder is connected to the first oil outlet through a pipeline, the second oil port of the first oil cylinder is connected to the second oil outlet through a pipeline, and the main oil return port is connected to the external oil tank through a pipeline, and the external oil tank is used to collect the oil flowing out of the main oil return port. The valve body 1 is connected with an electromagnetic unloading valve 7, the oil inlet end of the electromagnetic unloading valve 7 is connected with the main oil inlet port 100, and the oil outlet end of the electromagnetic unloading valve is connected with the main oil return port 101. The setting of the electromagnetic unloading valve facilitates the establishment of the pressure in the integrated mortar pump control valve. Under the action of the electromagnetic unloading valve, the pressure in the valve body reaches the set maximum value, thereby ensuring the oil supply pressure.

[0036] See also Figure 3 and Figure 6As shown, the first switching valve chamber 2 of the integrated mortar pump control valve is arranged in the valve body 1, and the first switching valve chamber 2 is respectively connected with the main oil inlet 100, the main oil return port 101, the first oil outlet 102 and the second oil outlet 103. The clearance in the first switching valve chamber 2 is matched with a first valve stem 200 that can reciprocate. The first valve stem 200 can make the main oil inlet 100 communicate with the first oil outlet 102 and the main oil return port 101 communicate with the second oil outlet 103, or make the main oil inlet 100 communicate with the first oil outlet 102 and the main oil return port 101 communicate with the second oil outlet 103, or make the main oil inlet 100 communicate with the first oil outlet 102. It is connected with the second oil outlet 103 and the main oil return port 101 is connected with the first oil outlet 102; the inner wall of the first switching valve chamber 2 is provided with a first oil hole 201, a second oil hole 202, a third oil hole 203 and a fourth oil hole 204 which are connected with the first switching valve chamber 2; the first oil hole 201 and the main oil inlet 100, the second oil hole 202 and the main oil return port 101, the third oil hole 203 and the first oil outlet 102, the fourth oil hole 204 and the second oil outlet 103 are all connected through the oil passage. A main oil circuit is provided between the main oil inlet 100 and the first switching valve chamber 2 to connect the two. The main oil circuit includes a horizontally arranged first section oil circuit 110 and an inclined second section oil circuit 108 in sequence, and an arc section oil circuit 109 is provided between the first section oil circuit 110 and the second section oil circuit 108. The inner walls of the first section oil circuit 110, the arc section oil circuit 109 and the second section oil circuit 108 have a smooth transition, and the cross-section of the main oil circuit is increased in sequence along the oil inlet direction of the main oil circuit. In this way, the oil pumped to the main oil inlet by the mortar pump can quickly enter the first switching valve chamber through the main oil circuit, and further reduce the flow resistance of the oil in the main oil circuit, thereby reducing the loss of oil pressure; as a further preference, the angle between the oil inlet direction of the first section of the oil circuit and the oil inlet direction of the second section of the oil circuit is 120 degrees to 145 degrees; in this way, the oil in the first section of the oil circuit can quickly enter the first switching valve chamber through the second section of the oil circuit, thereby further reducing the flow resistance of the oil in the main oil circuit, thereby reducing the loss of oil pressure.

[0037] See also Figure 4As shown, the second switching valve chamber 4 of the integrated mortar pump control valve is arranged in the valve body 1, and the second switching valve chamber 4 is respectively connected with the main oil inlet 100, the secondary oil return port 105, the third oil outlet 106 and the fourth oil outlet 107, and the clearance in the second switching valve chamber 4 is matched with a reciprocating second valve stem 400, and the second valve stem 400 can make the main oil inlet 100 communicate with the third oil outlet 106 and the secondary oil return port 105 communicate with the fourth oil outlet 107, or make the main oil inlet 100 communicate with the The fourth oil outlet 107 is connected and the secondary oil return port 105 is connected to the third oil outlet 106; the inner wall of the second switching valve chamber 4 is provided with a fifth oil hole 401, a sixth oil hole 402, a seventh oil hole 403 and an eighth oil hole 404 connected to the second switching valve chamber 4; the fifth oil hole 401 is connected to the main oil inlet 100, the sixth oil hole 402 is connected to the secondary oil return port 105, the seventh oil hole 403 is connected to the third oil outlet 106, and the eighth oil hole 404 is connected to the fourth oil outlet 107 through an oil passage. The second end surface of the valve body 1 is also provided with an oil inlet and outlet interface 104 for connecting the accumulator, and the oil inlet and outlet interface 104 is connected to the oil path connected between the main oil inlet 100 and the second switching valve chamber 4; when the main oil inlet 100 supplies oil to the second switching valve chamber 4, the accumulator supplements the oil supply to the second switching valve chamber 4 through the oil inlet and outlet interface 104. The oil path connecting the main oil inlet 100 and the fifth oil hole 401 is connected with a one-way valve 6 that allows oil to flow from the main oil inlet 100 to the fifth oil hole 401. The setting of the one-way valve not only ensures the stability of the pressure in the second switching valve cavity, but also enables the oil in the accumulator to quickly replenish the second switching valve cavity.

[0038] See again Figure 1 and Figure 2 As shown, the integrated mortar pump control valve also includes a first solenoid valve group 3 and a second solenoid valve group 5. The first solenoid valve group 3 is connected to the valve body 1, and is used to drive the first valve stem 200 to move back and forth in the first switching valve chamber 2; the second solenoid valve group 5 is connected to the valve body 1, and is used to drive the second valve stem 400 to move back and forth in the second switching valve chamber 4.

[0039] See again Figure 5As shown, during operation, the mortar pump pumps oil to the main oil inlet 100, and the oil in the main oil inlet 100 flows to the first switching valve chamber 2 and the second switching valve chamber 4, and the first solenoid valve group 3 drives the first valve stem 200 to reciprocate in the first switching valve chamber 2, so that the main oil inlet 100 is connected with the first oil outlet 102 and the main oil return port 101 is connected with the second oil outlet 103, or the main oil inlet 100 is connected with the second oil outlet 103 and the main oil return port 101 is connected with the first oil outlet 102; when the main oil inlet 100 is connected with the first oil outlet 102 and the main oil return port 101 is connected with the second oil outlet 103, the first oil outlet 102 supplies oil to the first oil port of the first oil cylinder, and the first oil cylinder moves The oil inlet 100 and the second oil outlet 103 are connected, and the main oil return port 101 are connected, and the second oil outlet 103 supplies oil to the second oil outlet of the first cylinder, and the first cylinder reverses the action, and the first oil outlet of the first cylinder returns oil to the first oil outlet 102, and the oil flows through the first oil outlet 102 and the main oil return port 101 to the external oil tank for storage; the first oil outlet 102 and the second oil outlet 103 supply oil to the first cylinder alternately under the switching action of the first valve stem 2, so as to realize the reciprocating action of the first cylinder. In addition, the second solenoid valve group 5 drives the second valve stem 400 to reciprocate in the second switching valve chamber 4, so that the main oil inlet 100 is connected with the third oil outlet 106 and the secondary oil return port 105 is connected with the fourth oil outlet 107, or the main oil inlet 100 is connected with the fourth oil outlet 107 and the secondary oil return port 105 is connected with the third oil outlet 106; when the main oil inlet 100 is connected with the third oil outlet 106 and the secondary oil return port 105 is connected with the fourth oil outlet 107, the third oil outlet 106 supplies oil to the first oil port of the second oil cylinder, the second oil cylinder is actuated, and the second oil port of the second oil cylinder returns oil to the fourth oil outlet 107, and the oil The liquid flows to the external oil tank for storage through the fourth oil outlet 107 and the secondary oil return port 105 in sequence; when the main oil inlet 100 is connected with the fourth oil outlet 107 and the secondary oil return port 105 is connected with the third oil outlet 106, the fourth oil outlet 107 supplies oil to the second oil port of the second cylinder, the second cylinder acts in the opposite direction, and the first oil port of the second cylinder returns oil to the third oil outlet 106, and the oil flows to the external oil tank for storage through the third oil outlet 106 and the secondary oil return port 105 in sequence; the third oil outlet 106 and the fourth oil outlet 107 alternately supply oil to the second cylinder under the switching action of the second valve stem 400 to realize the reciprocating action of the second cylinder.Since the first switching valve chamber, the first valve stem, the second switching valve chamber and the second valve stem are all integrated in the valve body, the oil path from the main oil inlet through the first switching valve chamber to the first oil outlet and the second oil outlet, and the oil path from the main oil inlet through the second switching valve chamber to the third oil outlet and the fourth oil outlet are both short, with low oil flow resistance and pressure loss, and the switching from the first oil cylinder to the second oil cylinder or the switching of oil supply between the two oil ports of the first oil cylinder and the switching of oil supply between the two oil ports of the second oil cylinder are all fast in response speed, and the oil pressure loss of the oil flowing out of the first oil outlet, the second oil outlet, the third oil outlet and the fourth oil outlet is low, which meets the requirements of the oil inlet pressure of the first oil cylinder and the second oil cylinder. Furthermore, the first switching valve chamber, the first valve stem, the second switching valve chamber and the second valve stem are all integrated in the valve body, so that the integrated mortar pump control valve has a small size, a simple structure, and is easy to install and assemble.

[0040] See again Figure 3 and Figure 5As shown, as an embodiment of the present invention, the valve body 1 at both ends of the first switching valve cavity 2 is respectively connected with a first end cover 205 and a second end cover 206, and the two ends of the first valve stem 200 are respectively connected with a first elastic member 207, and the outer ends of the two first elastic members 207 are respectively against the inner walls of the first end cover 205 and the second end cover 206, and the two first elastic members 207 are used to keep the first valve stem 200 in an initial state; the first end cover 205 is provided with a first oil cavity 208, and the first end cover 205 is provided with a first control oil port 209 connected with the first oil cavity 208; A second oil chamber 210 is provided in the second end cover 206, and a second control oil port 211 communicating with the second oil chamber 210 is provided on the second end cover 206; the first solenoid valve group 3 has a first control oil inlet 302, a first control oil return port 303, a first control oil outlet 304 and a second control oil outlet 305; the first control oil inlet 302 is communicated with the main oil inlet 100, the first control oil return port 303 is communicated with the main oil return port 101, the first control oil outlet 304 is communicated with the first control oil port 209, and the second control oil outlet 305 is communicated with the second control oil port 211. The first solenoid valve group 3 includes a first solenoid valve 300 and a second solenoid valve 301. The first solenoid valve 300 is used to control the oil to enter the second oil chamber 210 through the second control oil port 211, so that the first valve stem 200 moves to the side away from the second oil chamber 210; the second solenoid valve 301 is used to control the oil to enter the first oil chamber 208 through the first control oil port 209, so that the first valve stem 200 moves to the side away from the first oil chamber 208. That is, when the first solenoid valve 300 controls the oil to enter the second oil chamber 210 through the second control oil port 211, the oil pressure in the second oil chamber 210 overcomes the elastic force of the two first elastic members 207 to move the first valve stem 200 to the side away from the second oil chamber 210, at which time the main oil inlet 100 is connected to the second oil outlet 103, and the main oil return port is connected to the first oil outlet 102; when the second solenoid valve 301 controls the oil to enter the first oil chamber 208 through the first control oil port 209, the oil pressure in the first oil chamber 208 overcomes the elastic force of the two first elastic members 207 to move the first valve stem 200 to the side away from the first oil chamber 208, at which time the main oil inlet 100 is connected to the first oil outlet 102, and the main oil return port is connected to the second oil outlet 103.

[0041] See again Figure 4 and Figure 5As shown, as an embodiment of the present invention, the valve body 1 at both ends of the second switching valve chamber 4 is respectively connected to a third end cover 405 and a fourth end cover 406, and the two ends of the second valve stem 400 are respectively connected to a second elastic member 407, and the outer ends of the two second elastic members 407 are respectively against the inner walls of the third end cover 405 and the fourth end cover 406, and the two second elastic members 407 are used to keep the second valve stem 400 in an initial state; the third end cover 405 is provided with a third oil chamber 408, and the third end cover 405 is provided with a third control oil port 409 connected to the third oil chamber 408; A fourth oil chamber 410 is provided in the fourth end cover 406, and a fourth control oil port 411 connected to the fourth oil chamber 410 is provided on the fourth end cover 406; the second solenoid valve group 5 has a second control oil inlet 502, a second control oil return port 503, a third control oil outlet 504 and a fourth control oil outlet 505; the second control oil inlet 502 is connected to the main oil inlet 100, the second control oil return port 503 is connected to the secondary oil return port 105, the third control oil outlet 504 is connected to the third control oil port 409, and the fourth control oil outlet 505 is connected to the fourth control oil port 411. The second solenoid valve group 5 includes a third solenoid valve 500 and a fourth solenoid valve 501. The third solenoid valve 500 is used to control the oil to enter the fourth oil chamber 410 through the fourth control oil port 411, so that the second valve stem 400 moves to the side away from the fourth oil chamber 410; the fourth solenoid valve 501 is used to control the oil to enter the third oil chamber 408 through the third control oil port 504, so that the second valve stem 400 moves to the side away from the third oil chamber 408. That is, when the third solenoid valve 500 controls the oil to enter the fourth oil chamber 410 through the fourth control oil port 411, the oil pressure in the fourth oil chamber 410 overcomes the elastic force of the two second elastic members 407 to move the second valve stem 400 to the side away from the fourth oil chamber 410, at which time the main oil inlet 100 is connected to the fourth oil outlet 107, and the secondary oil return port 105 is connected to the third oil outlet 106; when the fourth solenoid valve 501 controls the oil to enter the third oil chamber 408 through the third control oil port 409, the oil pressure in the third oil chamber 408 overcomes the elastic force of the two second elastic members 407 to move the second valve stem 400 to the side away from the third oil chamber 408, at which time the main oil inlet 100 is connected to the third oil outlet 106, and the secondary oil return port 105 is connected to the fourth oil outlet 107.

[0042] See again Figure 5As shown, the working principle of an integrated mortar pump control valve of the present invention is as follows: the mortar pump delivers oil to the main oil inlet 100, the oil in the main oil inlet 100 flows to the first switching valve chamber 2 and the second switching valve chamber 4, and a part of the oil in the main oil inlet 100 flows to the accumulator for energy storage through the one-way valve 6; at this time, under the action of the electromagnetic unloading valve 7, the pressure in the valve body is quickly built up, so that the pressure reaches the set maximum value, thereby ensuring the oil supply pressure; when the first oil cylinder needs to work, the first electromagnetic valve group 3 drives the first valve stem 200 to reciprocate in the first switching valve chamber 2, so that the main oil inlet 100 is connected to the first oil outlet 102 and the main oil return port 101 is connected to the second oil outlet 103, or the main oil inlet 100 is connected to the second oil outlet 103 and the main oil return port 101 is connected to the first oil outlet 102; when the main oil inlet 100 and the first oil outlet 10 2 and the main oil return port 101 is connected with the second oil outlet 103, the first oil outlet 102 supplies oil to the first oil port of the first oil cylinder, the first oil cylinder acts, and the second oil port of the first oil cylinder returns oil to the second oil outlet 103, and the oil flows to the external oil tank through the second oil outlet 103 and the main oil return port 101 in sequence for storage; when the main oil inlet 100 is connected with the second oil outlet 103 and the main oil return port 100 is connected with the first oil outlet 102, the second oil outlet 103 supplies oil to the second oil port of the first oil cylinder, the first oil cylinder acts in the opposite direction, and the first oil port of the first oil cylinder returns oil to the first oil outlet 102, and the oil flows to the external oil tank through the first oil outlet 102 and the main oil return port 101 in sequence for storage; the first oil outlet 102 and the second oil outlet 103 alternately supply oil to the first oil cylinder under the switching action of the first valve stem 2 to realize the reciprocating action of the first oil cylinder.When the second oil cylinder needs to work, the second solenoid valve group 5 drives the second valve stem 400 to reciprocate in the second switching valve chamber 4, so that the main oil inlet 100 is connected with the third oil outlet 106 and the secondary oil return port 105 is connected with the fourth oil outlet 107, or the main oil inlet 100 is connected with the fourth oil outlet 107 and the secondary oil return port 105 is connected with the third oil outlet 106; at the same time, the accumulator supplies oil to the fifth oil hole 401 of the second switching valve chamber 4 through the oil inlet and outlet interface 104 to supplement the oil pressure in the second switching valve chamber 4, ensuring the oil outlet pressure of the third oil outlet 106 and the fourth oil outlet 107; when the main oil inlet 100 is connected with the third oil outlet 106 and the secondary oil return port 105 is connected with the fourth oil outlet 107, the third oil outlet 106 supplies oil to the fourth oil outlet 107. The first oil port of the second oil cylinder supplies oil, the second oil cylinder operates, and the second oil port of the second oil cylinder returns oil to the fourth oil outlet 107, and the oil flows to the external oil tank for storage through the fourth oil outlet 107 and the secondary oil return port 105 in sequence; when the main oil inlet 100 is connected with the fourth oil outlet 107 and the secondary oil return port 105 is connected with the third oil outlet 106, the fourth oil outlet 107 supplies oil to the second oil port of the second oil cylinder, the second oil cylinder operates in the opposite direction, and the first oil port of the second oil cylinder returns oil to the third oil outlet 106, and the oil flows to the external oil tank for storage through the third oil outlet 106 and the secondary oil return port 105 in sequence; the third oil outlet 106 and the fourth oil outlet 107 alternately supply oil to the second cylinder under the switching action of the second valve stem 400 to realize the reciprocating action of the second cylinder.

[0043] 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. An integrated mortar pump control valve, characterized in that: include The valve body has a main oil inlet connected to the mortar pump, a main oil return connected to the external oil tank, a first oil outlet connected to the first oil port of the first oil cylinder, and a second oil outlet connected to the second oil port of the first oil cylinder on its first end surface; a secondary oil return connected to the external oil tank, a third oil outlet connected to the first oil port of the second oil cylinder, and a fourth oil outlet connected to the second oil port of the second oil cylinder on its second end surface; an oil inlet and outlet interface connected to the accumulator is also provided on the second end surface of the valve body, and the oil inlet and outlet interface is connected to the oil path connected between the main oil inlet and the second switching valve cavity; when the main oil inlet supplies oil to the second switching valve cavity, the accumulator supplements the oil supply to the second switching valve cavity through the oil inlet and outlet interface; The first switching valve cavity is arranged in the valve body, and the first switching valve cavity is respectively connected with the main oil inlet, the main oil return port, the first oil outlet and the second oil outlet. The clearance in the first switching valve cavity is matched with a first valve stem that can move back and forth. The first valve stem can make the main oil inlet communicate with the first oil outlet and the main oil return port communicate with the second oil outlet, or make the main oil inlet communicate with the second oil outlet and the main oil return port communicate with the first oil outlet; the inner wall of the first switching valve cavity is provided with a first oil hole, a second oil hole, a third oil hole and a fourth oil hole connected with the first switching valve cavity; the first oil hole and the main oil inlet, the second oil hole and the main oil return port, the third oil hole and the first oil outlet, and the fourth oil hole and the second oil outlet are all connected through an oil passage; the valve body at both ends of the first switching valve cavity is respectively connected with a first end cover and The second end cover, the two ends of the first valve stem are respectively connected to a first elastic member, the outer ends of the two first elastic members are respectively against the inner walls of the first end cover and the second end cover, and the two first elastic members are used to keep the first valve stem in an initial state; the first end cover is provided with a first oil chamber, and the first end cover is provided with a first control oil port connected to the first oil chamber; the second end cover is provided with a second oil chamber, and the second end cover is provided with a second control oil port connected to the second oil chamber; the first solenoid valve group has a first control oil inlet, a first control oil return port, a first control oil outlet and a second control oil outlet; the first control oil inlet is connected to the main oil inlet, the first control oil return port is connected to the main oil return port, the first control oil outlet is connected to the first control oil port, and the second control oil outlet is connected to the second control oil port; The second switching valve chamber is arranged in the valve body, and the second switching valve chamber is respectively connected with the main oil inlet, the secondary oil return port, the third oil outlet and the fourth oil outlet. The clearance in the second switching valve chamber is matched with a second valve stem which can move back and forth. The second valve stem can make the main oil inlet communicate with the third oil outlet and the secondary oil return port communicate with the fourth oil outlet, or make the main oil inlet communicate with the fourth oil outlet and the secondary oil return port communicate with the third oil outlet; the inner wall of the second switching valve chamber is provided with a fifth oil hole, a sixth oil hole, a seventh oil hole and an eighth oil hole which are connected with the second switching valve chamber; the fifth oil hole is connected with the main oil inlet, the sixth oil hole is connected with the secondary oil return port, the seventh oil hole is connected with the third oil outlet, and the eighth oil hole is connected with the fourth oil outlet through an oil passage; the valve bodies at both ends of the second switching valve chamber are respectively connected with the third end cover and The fourth end cover, the two ends of the second valve stem are respectively connected to a second elastic member, the outer ends of the two second elastic members are respectively against the inner walls of the third end cover and the fourth end cover, and the two second elastic members are used to keep the second valve stem in an initial state; the third end cover is provided with a third oil chamber, and the third end cover is provided with a third control oil port connected to the third oil chamber; the fourth end cover is provided with a fourth oil chamber, and the fourth end cover is provided with a fourth control oil port connected to the fourth oil chamber; the second solenoid valve group has a second control oil inlet, a second control oil return port, a third control oil outlet and a fourth control oil outlet; the second control oil inlet is connected to the main oil inlet, the second control oil return port is connected to the secondary oil return port, the third control oil outlet is connected to the third control oil port, and the fourth control oil outlet is connected to the fourth control oil port; A first solenoid valve group, connected to the valve body, for driving the first valve stem to reciprocate in the first switching valve chamber; The second solenoid valve group is connected to the valve body and is used to drive the second valve stem to move back and forth in the second switching valve chamber.

2. The integrated mortar pump control valve according to claim 1, characterized in that: The oil path connecting the main oil inlet and the fifth oil hole is connected with a one-way valve which allows the oil to flow from the main oil inlet to the fifth oil hole.

3. The integrated mortar pump control valve according to claim 1, characterized in that: The valve body is connected with an electromagnetic unloading valve, the oil inlet end of the electromagnetic unloading valve is communicated with the main oil inlet port, and the oil outlet end of the electromagnetic unloading valve is communicated with the main oil return port.

4. The integrated mortar pump control valve according to claim 1, characterized in that: The first solenoid valve group includes a first solenoid valve and a second solenoid valve. The first solenoid valve is used to control the oil to enter the second oil chamber through the second control oil port, so that the first valve stem moves to the side away from the second oil chamber; the second solenoid valve is used to control the oil to enter the first oil chamber through the first control oil port, so that the first valve stem moves to the side away from the first oil chamber.

5. The integrated mortar pump control valve according to claim 1, characterized in that: The second solenoid valve group includes a third solenoid valve and a fourth solenoid valve. The third solenoid valve is used to control the oil to enter the fourth oil chamber through the fourth control oil port, so that the second valve stem moves to the side away from the fourth oil chamber; the fourth solenoid valve is used to control the oil to enter the third oil chamber through the third control oil port, so that the second valve stem moves to the side away from the third oil chamber.

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