Mixing and pumping pump cleaning device and mixing and pumping pump cleaning method

Abstract

This significantly reduces the labor and manpower required for cleaning the inside of a mixing and pumping pump after use, which is necessary to prevent mortar from adhering to the pump and hardening. [Solution] The cleaning device 10 for a kneading pump 100 is provided, in which a mixing casing 104, which communicates with the hopper discharge port 103 and the interior of the mortar flow path, and a snake pump 110 connected to it are arranged in order from the upstream side of the mortar flow path, the mixing casing 104 and the snake pump 110 are inclined so that the downstream side is lower, and the mixing casing 104 has a rotatable mixing screw 106 and a stirring rod 107 with stirring blades 108 installed in order from the upstream side, and a kneading water supply port 105 is provided which communicates with the interior, and at least a cleaning water supply hole 115 is formed in the mixing casing 104 at a position between the upstream end of the mixing casing 104 and the hopper discharge port 103, and a cleaning water supply mechanism 200 is provided which supplies water W to the cleaning water supply hole 115.

Description

Technical Field

[0001] The present invention relates to a kneading and pumping pump cleaning device and a kneading and pumping pump cleaning method for cleaning the inside of a kneading and pumping pump that kneads and pumps mortar injected into the ground of a tunnel, for example.

Background Art

[0002] Conventionally, there is a kneading and pumping pump disclosed in Patent Document 1 for kneading and pumping mortar injected into the ground of a tunnel. As shown in FIG. 9, this kneading and pumping pump 300 has a hopper 301 having a shutter 302, and a cylindrical mixing housing 304 whose interior is in communication with the discharge port 303 of the hopper 301 and is inclined so that the downstream side, which is the mortar discharge side, is lower. A water supply port 305 for injecting kneading water W provided on the downstream side of the discharge port 303 is in communication with the interior of the mixing housing 304.

[0003] Inside the mixing housing 304, there are provided a mixing screw 306 for dry mixing of dry mortar DM and a stirring rod 307 having stirring blades 308 connected axially to the mixing screw 306. The mixing screw 306 and the stirring rod 307 are rotatable by a motor 309 provided on the upstream side of the mixing housing 304. The dry mortar DM introduced into the interior of the mixing housing 304 from the discharge port 303 of the hopper 301 is conveyed to the downstream side of the mixing housing 304 by the rotation of the mixing screw 306 and is mixed with the water W injected from the water supply port 305 by the rotation of the stirring blades 308.

[0004] The mortar M generated by kneading the dry mortar DM and water is transferred into the interior of a snake pump 310 connected to the downstream side of the mixing housing 304. By rotating the rotor 312 by the motor 309 within the stator 311 having an inner peripheral spiral shape, the mortar M is pressurized while being kneaded and discharged from the discharge port 313.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2010-174494 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] By the way, when using this mixing pump to inject mortar, if the necessary parts are not disassembled, washed with water, and reassembled after each operation, the mortar remaining inside the mixing casing will stick to the mixing screw, stirring blades, and the inner walls of the mixing casing and harden. In other words, there is a problem in that a very time-consuming cleaning process is required after using the mixing pump to prevent mortar from adhering to and hardening inside the mixing pump.

[0007] In view of the above problems, the present invention is proposed and aims to provide a mixing and pump cleaning device and a mixing and pump cleaning method that can significantly reduce the labor and manpower required for cleaning the inside of a mixing and pump after use to prevent mortar from adhering to the inside of the mixing and pump and hardening. [Means for solving the problem]

[0008] The present invention provides a cleaning device for a kneading pump, wherein a mixing casing is provided at an angle such that the downstream side is lower, and a rotatable mixing screw and a stirring rod with stirring blades are housed inside the mixing casing in order from the upstream side, and a kneading water supply port is provided downstream of the hopper discharge port, communicating with the inside of the mixing casing, wherein at least a cleaning water supply hole is formed in the mixing casing at a position between the upstream end of the mixing casing and the hopper discharge port, and the device is equipped with a cleaning water supply mechanism for supplying water to the cleaning water supply hole. According to this method, the inside of the mixing pump can be cleaned by supplying water through a cleaning water supply hole while the mixing screw and stirring rod with agitator blades rotate inside the mixing casing. In other words, there is no need to disassemble, wash, and reassemble the parts of the mixing pump, and the inside of the mixing pump can be cleaned by utilizing the inherent characteristic of the mixing pump that the mixing screw and stirring rod with agitator blades rotate inside the mixing casing. Therefore, the cleaning work required to prevent mortar from adhering to the inside of the mixing pump and hardening after use can be greatly reduced in terms of labor and manpower. In addition, since the inside of the mixing pump can be easily cleaned, it is possible to clean it frequently, and the mixing pump can always be used in a well-maintained state. Furthermore, it eliminates the need to secure space to spread out the parts when cleaning, which was previously required. Furthermore, since the mixing pump's action of mixing and pushing mortar can be used to clean the inside of the mixing casing, there is no need to introduce high-pressure cleaning water into the mixing casing, and the inside of the mixing pump can be cleaned even with low-pressure cleaning water.

[0009] The mixing and pumping cleaning device of the present invention is characterized in that the cleaning water supply mechanism comprises a cleaning water supply channel that transfers water to the cleaning water supply hole, a switching valve that switches the flow path from the mixing water supply channel for mortar mixing to the cleaning water supply channel, and an operating unit that is responsible for the switching operation of the switching valve. According to this, it is possible to construct a structure that effectively utilizes the water flowing through the water supply channel for mortar mixing and supplies water to clean the inside of the mixing pump. In addition, the flow of water supplied to the mortar mixing channel can be easily switched and used for cleaning work.

[0010] The mixing and pumping pump cleaning device of the present invention is characterized in that the cleaning water supply holes are also formed at positions corresponding to the stirring rod with stirring blades in the mixing casing. According to this, the inside of the mixing pump can be more reliably cleaned by having a cleaning water supply hole located between the upstream end of the mixing casing and the hopper outlet, and another cleaning water supply hole formed further downstream at a distance from this hole.

[0011] The mixing pump cleaning device of the present invention is characterized in that the mixing pump is arranged in the order of the mixing housing and a snake pump having a rotatable rotor and connected to the mixing housing, with the mixing housing and the snake pump being inclined so that the downstream side is lower, and another cleaning water supply hole communicating with the mortar flow path of the mixing pump is formed near the mortar discharge port on the downstream side of the snake pump. According to this, by supplying water from a separate cleaning water supply hole, the inside of the mixing and conveying pump around the mortar discharge port downstream of the snake pump can be more reliably cleaned. Furthermore, since the inside of the mixing casing and the snake pump can be cleaned by utilizing the mixing and conveying pump's action of mixing and conveying mortar, there is no need to introduce high-pressure cleaning water into the mixing casing, etc., and the inside of the mixing and conveying pump can be cleaned even with low-pressure cleaning water.

[0012] The present invention provides a method for cleaning a kneading pump, wherein a mixing casing, which communicates with a hopper discharge port, is provided at an angle such that the downstream side is lower, and a rotatable mixing screw and a stirring rod with stirring blades are housed inside the mixing casing in order from the upstream side, and a kneading water supply port is provided downstream of the hopper discharge port, communicating with the inside of the mixing casing, characterized in that, at least between the upstream end of the mixing casing and the hopper discharge port, water is supplied into the inside of the mixing casing from a cleaning water supply hole formed in the mixing casing, and the mixing screw and the stirring rod with stirring blades are rotated to clean the inside of the kneading pump. According to this method, the inside of the mixing pump can be cleaned by supplying water through a cleaning water supply hole while the mixing screw and stirring rod with agitator blades rotate inside the mixing casing. In other words, there is no need to disassemble, wash, and reassemble the parts of the mixing pump, and the inside of the mixing pump can be cleaned by utilizing the inherent characteristic of the mixing pump that the mixing screw and stirring rod with agitator blades rotate inside the mixing casing. Therefore, the cleaning work required to prevent mortar from adhering to the inside of the mixing pump and hardening after use can be greatly reduced in terms of labor and manpower. In addition, since the inside of the mixing pump can be easily cleaned, it is possible to clean it frequently, and the mixing pump can always be used in a well-maintained state. Furthermore, it eliminates the need to secure space to spread out the parts when cleaning, which was previously required. Furthermore, since the mixing pump's action of mixing and pushing mortar can be used to clean the inside of the mixing casing, there is no need to introduce high-pressure cleaning water into the mixing casing, and the inside of the mixing pump can be cleaned even with low-pressure cleaning water.

[0013] The present invention's method for cleaning a mixing and pumping pump is characterized by supplying cleaning water to the cleaning water supply channel that transfers water to the cleaning water supply hole, by switching the flow path from the mixing water supply channel for mortar mixing. According to this, it is possible to construct a structure that effectively utilizes the water flowing through the water supply channel for mortar mixing and supplies water to clean the inside of the mixing pump. In addition, the flow of water supplied to the mortar mixing channel can be easily switched and used for cleaning work. [Effects of the Invention]

[0014] According to the present invention, the cleaning work required to prevent mortar from adhering to and hardening inside the mixing and pumping pump after use can be significantly reduced in terms of labor and manpower. [Brief explanation of the drawing]

[0015] [Figure 1] Perspective view showing the configuration of the kneading and pumping pump cleaning device according to the embodiment of the present invention. [Figure 2] Front view of a partial cross-section of the kneading and pumping pump in the embodiment. [Figure 3] Explanatory diagram for explaining the flow of water during mortar kneading and pumping in the kneading and pumping pump cleaning device of the embodiment. [Figure 4] Explanatory diagram for explaining the flow of water during the cleaning operation in the kneading and pumping pump cleaning device of the embodiment. [Figure 5] Flowchart showing the flow of the kneading and pumping pump cleaning method of the embodiment. [Figure 6] Explanatory diagram for explaining the flow of water during the cleaning operation in the kneading and pumping pump cleaning device of the first modification example of the embodiment. [Figure 7] Explanatory diagram for explaining the flow of water during the cleaning operation in the kneading and pumping pump cleaning device of the second modification example of the embodiment. [Figure 8] Explanatory diagram for explaining the flow of water during the cleaning operation in the kneading and pumping pump cleaning device of the third modification example of the embodiment. [Figure 9] Front view of a partial cross-section of a conventional kneading and pumping pump.

Mode for Carrying Out the Invention

[0016] 〔Kneading and Pumping Pump Cleaning Device and Kneading and Pumping Pump Cleaning Method of the Embodiment〕 The kneading and pumping pump cleaning device 10 according to the embodiment of the present invention is, as shown in FIGS. 1 to 4, for example, a kneading and pumping pump 100 that kneads and pumps mortar injected into the natural ground of a tunnel, and a cleaning water supply mechanism 200 that supplies cleaning water W for cleaning the inside of the kneading and pumping pump 10.

[0017] The mixing pump 100 has a hopper 101 with a shutter 102 into which dry mortar DM is fed from above, and a cylindrical mixing casing 104 whose interior is in communication with the discharge port 103 of the hopper 101 and which is inclined so that the downstream side, which is the mortar discharge side, is lower. A mixing water inlet 105 for injecting mixing water W, which is in communication with the interior of the mixing casing 104, is located downstream of the discharge port 103. A snake pump 110 is connected to the downstream side of the mixing casing 104, and the mixing casing 104 and the snake pump 110 are arranged in order from the upstream side of the mortar flow path, and the mixing casing 104 and the snake pump 110 are inclined so that the downstream side of the mortar flow path is lower, for example, with an axial tilt angle of about 15 degrees.

[0018] Inside the mixing casing 104, in order from the upstream side of the mortar flow path, are a mixing screw 106 for dry mixing of dry mortar DM and a stirring rod 107 having stirring blades 108 that are axially connected to the mixing screw 106. A motor 109 located on the upstream side of the mixing casing 104 allows the mixing screw 106 and the stirring rod 107 to rotate around their axes. The dry mortar DM, which is introduced into the mixing casing 104 from the discharge port 103 of the hopper 101, is carried to the downstream side of the mixing casing 104 by the rotation of the mixing screw 106, and is mixed with water W injected from the mixing water inlet 105 by the rotation of the stirring blades 308.

[0019] The mortar M, produced by mixing dry mortar DM and water W, is transferred to the inside of a snake pump 110 connected to the downstream side of the mixing casing 104. There, the rotor 112 is rotated by a motor 109 within the spiral-shaped stator 111, causing the mortar M to be further mixed and extruded, and discharged from the discharge port 113 under a predetermined pressure. The mortar M discharged from the discharge port 113 is then pumped through an injection hose 114 into, for example, the ground of a tunnel or a borehole formed in the ground.

[0020] Furthermore, the mixing housing 104 is provided with cleaning water supply holes 115 located between the upstream end of the mixing housing 104 and the discharge port 103 of the hopper 101, so as to communicate with the inside of the mixing housing 104. In the illustrated example, multiple cleaning water supply holes 115 are formed at three or other locations on the upper side of the mixing housing 104, spaced apart in the circumferential direction.

[0021] Furthermore, the mixing housing 104 is also provided with cleaning water supply holes 116 at positions corresponding to the stirring rod 107 with internally installed stirring blades 108, and is formed to communicate with the inside of the mixing housing 104. In the illustrated example, cleaning water supply holes 116 are formed at multiple locations, such as three locations spaced apart in the circumferential direction of the mixing housing 104, on the upper side of the mixing housing 104.

[0022] Near the discharge port 113 of the mortar M downstream of the snake pump 110, another cleaning water supply hole 117 is formed that communicates with the mortar flow path of the mixing and pumping pump 100. In this embodiment, a flange 118 having a through-hole 119 for the mortar flow path is provided at the downstream end of the snake pump 110, and a discharge port 113 is provided that communicates with the through-hole 119 so as to protrude downstream from the flange 118. The cleaning water supply holes 117 are formed from the circumferential surface of the flange 118 so as to communicate with the through-hole 119, and in the illustrated example, multiple cleaning water supply holes 117 are formed at two or more locations spaced apart in the circumferential direction of the flange 118.

[0023] The hopper 101, the mixing casing 104, and the snake pump 110 are supported by a frame 120, and the control panel 121 located on the side of the hopper 101 is also supported by the frame 120. The control panel 121 is equipped with an operating unit 204 that is responsible for switching the supply of water W from the mixing water supply channel 122, which supplies water W to the mixing water inlet 105 when mixing and pumping mortar M (described later), to the washing water supply channel 201, which washes the mixing pump 100.

[0024] The cleaning water supply mechanism 200 is configured to supply water W to cleaning water supply holes 115, 116, and 117. The cleaning water supply mechanism 200 has a cleaning water supply channel 201 for transporting water W to the cleaning water supply holes 115, 116, and 117, and branch nipples 202 are provided at predetermined locations in the cleaning water supply channel 201 to branch off and supply water W to each of the cleaning water supply holes 115, 116, and 117.

[0025] Furthermore, the washing water supply mechanism 200 has a switching valve 203 that switches the flow path between the mixing water supply channel 122 for mortar mixing and the washing water supply channel 201, which supply water W to the mixing water inlet 105, and an operating unit 204 that is responsible for switching the switching valve 203 with ON / OFF operation. In the illustrated example, the switching valve 203 is an electromagnetic switching valve that opens and closes with the operation of the operating unit 204. Water W is supplied to the switching valve 203 from the water tap 20 via the water supply channel 21. The mixing water supply channel 122 and the washing water supply channel 201 are branched via the switching valve 203.

[0026] When cleaning the mixing and pumping pump 100 with the mixing and pumping pump cleaning device 10 of this embodiment, as shown in Figure 5, after the mortar mixing and pumping work is completed, the shutter 102 is closed (S1) to prevent the dry mortar DM remaining in the hopper 101 from falling out and to prevent the cleaning water W from entering the hopper 101. Then, the switching valve 203 is switched by the switching operation of the operating unit 204 to switch the water supply path from the mixing water supply channel 122 for mortar mixing to the cleaning water supply channel 201 (S2), and water W is supplied from the water tap 20 to the cleaning water supply channel 201 via the water supply channel 21 (S3). The cleaning water W supplied from the cleaning water supply channel 201 is supplied to the inside of the mixing housing 104 through the cleaning water supply holes 115 and 116, and is supplied to the mortar flow path near the discharge port 113 of the mortar M downstream of the snake pump 110 through the cleaning water supply hole 117 (S4).

[0027] In parallel with supplying water to the inside of the mixing casing 104 and to the mortar flow path near the discharge port 113, the motor 109 is driven by the operation of the control panel 121 to put the mixing pump 100 into operation, and the mixing screw 106, the stirring rod 107 with stirring blades 108 and the rotor 112 are rotated (S5). By supplying water while the mixing pump 100 is in operation, the mortar M that has adhered to and remained on the inner wall of the mixing casing 104, the mixing screw 106, the stirring rod 107 with stirring blades 108, the stator 111 and rotor 112, and the discharge port 113 is washed away, and the inside of the mixing pump 100 is washed (S6).

[0028] Furthermore, the operation of driving the motor 109 to put the mixing and pumping pump 100 into operation, and rotating the mixing screw 106, the stirring rod 107 with stirring blades 108, and the rotor 112, can be performed before, after, or simultaneously with, the supply of water to the inside of the mixing housing 104 and the supply of water to the mortar flow path near the discharge port 113. In addition, a flow rate adjustment valve can be provided in the water supply channel 21, operated by the control panel 121, to adjust the amount of water supplied to the switching valve 203 during mixing and pumping of mortar M and during washing.

[0029] After the internal cleaning of the mixing and pumping pump 100 is completed, the water supply from the water tap 20 to the cleaning water supply channel 201 is stopped, the switching valve 203 is switched by the operation of the control unit 204 to switch the water supply path from the cleaning water supply channel 201 to the mixing water supply channel 122 for mortar mixing, and the motor 109 is stopped by the operation of the control panel 121 to shut down the mixing and pumping pump 100 (S7).

[0030] According to this embodiment, the inside of the mixing pump 100 can be cleaned by supplying water from the cleaning water supply holes 115, 116, and 117 while rotating the mixing screw 106 and the stirring rod 107 with stirring blades 108 inside the mixing housing 104. In other words, there is no need to disassemble, wash, and reassemble the parts of the mixing pump 100, and the inside of the mixing pump 100 can be cleaned by utilizing the inherent characteristics of the mixing pump 100, which are the parts to be cleaned, such as the mixing screw 106 and the stirring rod 107 with stirring blades 108, which rotate inside the mixing housing. Therefore, the cleaning work required to prevent mortar M from adhering to and hardening inside the mixing pump 100 after use can be greatly reduced in terms of labor and manpower.

[0031] Furthermore, because the inside of the mixing and pumping pump 100 can be easily cleaned, it is possible to clean it frequently before any remaining mortar M adheres to and hardens on the mixing screw 106, stirring blades 108, the inner walls of the mixing casing 104, etc., allowing the mixing and pumping pump 100 to be used in a consistently good maintenance state. In addition, it eliminates the need to secure space to spread out the parts when cleaning, which was previously required.

[0032] Furthermore, by utilizing the action of mixing and pushing mortar M from the mixing casing 104 of the mixing pump 100 to the snake pump 110, the inside of the mixing casing 104 and the snake pump 110 can be cleaned. Therefore, it is not necessary to introduce high-pressure cleaning water into the mixing casing 104, and the inside of the mixing pump 100 can be cleaned even with low-pressure cleaning water.

[0033] Furthermore, the cleaning water supply hole 115 located between the upstream end of the mixing housing 104 and the hopper discharge port 103, and the cleaning water supply hole 116 formed further downstream at a distance from it, allow for more thorough cleaning of the inside of the mixing and conveying pump 100. In addition, the supply of water from the cleaning water supply hole 117 near the mortar discharge port 113 allows for more thorough cleaning of the inside of the mixing and conveying pump 100 around the mortar discharge port 113 downstream of the snake pump 110.

[0034] Furthermore, the cleaning water supply mechanism 200 makes effective use of the water W flowing through the water supply channel 21 for supplying water to the mixing water supply channel 212 for mortar mixing, and constructs a structure that supplies water W for cleaning the inside of the mixing pump 100. In addition, the flow of water W directed to the mixing water supply channel 122 for mortar mixing can be easily switched and used for cleaning work.

[0035] [Scope of the invention disclosed herein] The inventions disclosed herein include, in addition to the inventions and embodiments listed herein, the inventions disclosed herein also include, to the extent applicable, those that modify the partial content of these inventions to include other content disclosed herein, or those that add other content disclosed herein to these inventions, or those that delete the partial content to the extent that partial effects are obtained and define them as broader concepts. Furthermore, the inventions disclosed herein also include the following and modifications.

[0036] For example, in the mixing and pumping cleaning device 10 of the above embodiment, a cleaning water supply hole 115 is provided at a position between the upstream end of the mixing housing 104 and the discharge port 103 of the hopper 101, a cleaning water supply hole 116 is provided at a position corresponding to the stirring rod 107 with stirring blades 108 installed inside the mixing housing 104, and a cleaning water supply hole 117 is provided near the discharge port 113 of the mortar M on the downstream side of the snake pump 110. However, the present invention includes any configuration in which a cleaning water supply hole 115 is provided in the mixing housing 104 at a position between the upstream end of the mixing housing 104 and the hopper discharge port 103.

[0037] That is, as shown in the first modified example in Figure 6, a cleaning water supply hole 115 may be provided between the upstream end of the mixing housing 104 and the discharge port 103 of the hopper 101, without providing the cleaning water supply hole 117, and a cleaning water supply hole 116 may be provided at a position corresponding to the stirring rod 107 with stirring blades 108 installed inside the mixing housing 104. Alternatively, as shown in the second modified example in Figure 7, a cleaning water supply hole 115 may be provided between the upstream end of the mixing housing 104 and the discharge port 103 of the hopper 101, without providing the cleaning water supply hole 116, and a cleaning water supply hole 117 may be provided near the discharge port 113 of the mortar M on the downstream side of the snake pump 110. Furthermore, as shown in the third modified example in Figure 8, a cleaning water supply hole 115 may be provided between the upstream end of the mixing housing 104 and the discharge port 103 of the hopper 101, without providing the cleaning water supply holes 116 and 117.

[0038] Alternatively, for example, a high-pressure treatment device such as a high-pressure washer may be installed in the water supply channel 21 that supplies water W from the water tap 20 to the switching valve 203, thereby increasing the pressure of the water W, and the high-pressure water may be supplied to the cleaning water supply channel 201 when cleaning the inside of the mixing and pumping pump 100.

[0039] Furthermore, the kneading pump to be cleaned in this invention is not limited to the kneading pump 100 of the above embodiment, but is appropriate within the scope of the spirit of this invention. [Industrial applicability]

[0040] This invention can be used, for example, when cleaning the inside of a mixing and pumping pump that mixes and pumps mortar to be injected into the ground of a tunnel. [Explanation of symbols]

[0041] 10…Mixing and pump cleaning device 100…Mixing and pumping pump 101…Hopper 102…Shutter 103…Discharge port 104…Mixing housing 105…Mixing water inlet 106…Mixing screw 107…Agitator 108…Agitator blades 109…Motor 110…Snake pump 111…Stator 112…Rotor 113…Discharge port 114…Injection hose 115, 116, 117…Cleaning water supply holes 118…Flange 119…Through hole 120…Frame 121…Control panel 122…Mixing water supply channel 200…Cleaning water supply mechanism 201…Cleaning water supply channel 202…Branching nipple 203…Switching valve 204…Operating unit 20…Water tap 21…Water supply channel 300…Mixing and pumping pump 301...Hopper 302...Shutter 303...Discharge port 304...Mixing casing 305...Water inlet 306...Mixing screw 307...Agitator 308...Agitator blades 309...Motor 310...Snake pump 311...Stator 312...Rotor 313...Discharge port DM...Dry mortar M...Mortar W...Water

Claims

1. The mixing casing, which communicates with the hopper outlet and its interior, is installed at an angle such that the downstream side is lower. A rotatable mixing screw and a stirring rod with stirring blades are housed in the mixing casing, starting from the upstream side. A cleaning device for a kneading pump, wherein a kneading water inlet is provided downstream of the hopper discharge port and communicates with the inside of the mixing casing, A mixing pump cleaning device characterized in that, at least, a water supply hole for cleaning is formed in the mixing housing at a position between the upstream end of the mixing housing and the hopper discharge port, and the device is equipped with a water supply mechanism for cleaning that supplies water to the water supply hole for cleaning.

2. The mixing pump cleaning device according to claim 1, characterized in that the cleaning water supply mechanism comprises a cleaning water supply channel for transferring water to the cleaning water supply hole, a switching valve for switching the flow path from a mixing water supply channel for mortar mixing to the cleaning water supply channel, and an operating unit responsible for operating the switching valve.

3. The mixing and pumping pump cleaning device according to claim 1 or 2, characterized in that the cleaning water supply hole is also formed at a position corresponding to the stirring rod with stirring blades in the mixing housing.

4. In the aforementioned mixing pump, the mixing casing and a snake pump having a rotatable rotor and connected to the mixing casing are arranged in order from the upstream side of the mortar flow path, and the mixing casing and the snake pump are inclined so that the downstream side is lower. The mixing and pumping pump cleaning device according to claim 1 or 2, characterized in that another cleaning water supply hole is formed near the mortar discharge port on the downstream side of the snake pump, which communicates with the mortar flow path of the mixing and pumping pump.

5. A method for cleaning a kneading pump, comprising: a mixing casing that communicates with the hopper discharge port and its interior, which is inclined so that the downstream side is lower, a rotatable mixing screw and a stirring rod with stirring blades housed inside the mixing casing in order from the upstream side, and a kneading water inlet located downstream of the hopper discharge port that communicates with the interior of the mixing casing, A method for cleaning a kneading pump, characterized by supplying water to the inside of the mixing housing from a cleaning water supply hole formed in the mixing housing at least between the upstream end of the mixing housing and the hopper discharge port, and rotating the mixing screw and the stirring rod with stirring blades to clean the inside of the kneading pump.

6. The mixing pump cleaning method according to claim 5, characterized in that the cleaning water supply channel that transfers water to the cleaning water supply hole is supplied with cleaning water by switching the flow path from the mixing water supply channel for mortar mixing.

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