Pinch valve, pinch valve using method and cleaning device

Abstract

The invention relates to a pinch valve which comprises a hose. The first clamping body is arranged on one side of the hose; the second clamping body is arranged on the other side of the hose relative to the first clamping body; a motor; the transmission mechanism is in transmission connection with the motor, the first clamping body and the second clamping body, and the first clamping body and the second clamping body are driven by the motor to be relatively close to each other to extrude the hose and are relatively separated to release the hose; the distance detector is used for detecting the relative distance between the first clamping body and the second clamping body; the signal acquisition circuit is in electric signal connection with the motor and used for detecting motor working parameters. The pinch valve can meet the large-flux requirement, can be applied to the negative pressure environment, and can effectively judge whether foreign matter exists in the hose or not. The invention relates to an application method of the pinch valve and a cleaning device applying the pinch valve.

Description

Technical Field

[0001] The invention relates to a pinch valve, a method for using the pinch valve and a cleaning device. Background Art

[0002] The pinch valve is also called the tube pinch valve, the tube compression valve, the airbag valve, the clamp valve, etc. The solenoid pinch valve is a form of the pinch valve. The solenoid pinch valve is driven by the solenoid solenoid and controls the on-off by squeezing or loosening the hose. The medium only passes through the hose, and other parts of the valve body do not contact the medium, which means that compared with other types of solenoid valves, the solenoid pinch valve can pass medium with particles.

[0003] Cleaning machines also need to use valve bodies that can pass larger media. Compared with the structure of ordinary valve bodies that require media, pinch valves are more suitable for the waste recovery pipeline system of cleaning machines. However, if the electromagnetic pinch valve is used in the waste recovery pipeline system of the cleaning machine, there are the following problems. The electromagnetic pinch valve is based on its electromagnetic working principle, and its power is limited. Usually, its valve diameter is small, and it is difficult to apply to the large-flux application requirements of the cleaning machine that need to pass water and solids, long fibers and their mixtures. In addition, the waste recovery pipeline system in the cleaning machine works in a negative pressure environment, and the electromagnetic pinch valve cannot work normally in a negative pressure environment, and cannot meet the use conditions of the cleaning machine. There are a lot of dirt that is easy to stick and produce odor in the waste recovery pipeline system of the cleaning machine, and the hose of the electromagnetic pinch valve is easy to stick to foreign matter. If it is not handled in time, it is easy to cause odor and poor sealing, which affects its use experience and effect in the cleaning machine. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pinch valve which can meet the large flux demand, can be applied to negative pressure environment, and can effectively judge whether there are foreign objects in the hose.

[0005] The second technical problem to be solved by the present invention is to provide a method for using a pinch valve that can determine whether there is foreign matter in a hose and clean it in time in view of the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a cleaning device using the pinch valve according to the above-mentioned prior art.

[0007] The technical solution adopted by the present invention to solve the above-mentioned first technical problem is: a pinch valve, comprising

[0008] hose;

[0009] A first clamping body, disposed on one side of the hose;

[0010] A second clamping body, arranged on the other side of the hose relative to the first clamping body;

[0011] It is characterized by: it also includes

[0012] Motor;

[0013] The transmission mechanism is respectively connected to the motor, the first clamping body and the second clamping body, and driven by the motor to drive the first clamping body and the second clamping body to move closer to each other to squeeze the hose, and to move away from each other to release the hose;

[0014] A distance detector, used to detect the relative distance between the first clamping body and the second clamping body;

[0015] Signal acquisition circuit, motor electrical signal connection, used to detect motor working parameters.

[0016] The structure is simple. The transmission mechanism includes a gear connected to the motor driving end, and a first rack and a second rack arranged on both sides of the gear and meshing with the gear. The first rack is connected to the first clamping body, and the second rack is connected to the second clamping body.

[0017] As an improvement, the distance detector comprises a first distance sensor and a second distance sensor which are arranged opposite to each other and spaced apart along the clamping direction, the first distance sensor is connected to the first rack, and the second distance sensor is connected to the second rack.

[0018] In order to facilitate installation, a mounting seat is also included, and the motor and the transmission mechanism are both arranged on the mounting seat. The first rack and the second rack can be movably constrained on the mounting seat along the clamping direction.

[0019] Preferably, a first frame is slidably constrained on the mounting seat along the clamping direction, the first rack is formed on the first frame, and an end of the first clamping body is connected to an end of the first frame through a connecting rod;

[0020] A second frame is slidably constrained above the first frame along a clamping direction, the second rack is formed on the second frame, and the second clamping body is connected to an end of the second frame.

[0021] In order to effectively protect the hose and realize the connection between the hose and other components, so that the pinch valve can be installed as an integral component, a first buffer sheet is provided on the hose corresponding to the clamping position of the first clamping body, and a rod body is provided on the first buffer sheet and penetrates the first clamping body along the clamping direction;

[0022] A second buffer sheet is provided on the hose at a clamping position corresponding to the second clamping body, and the second buffer sheet is connected to the second clamping body.

[0023] Preferably, it further comprises a hollow valve body, the hose is connected to the valve body, and the valve body is provided with a flushing port for connecting to a water source.

[0024] The technical solution adopted by the present invention to solve the second technical problem is: a method for using a pinch valve, characterized in that: the pinch valve as described above is adopted;

[0025] The method of using the pinch valve includes the following steps:

[0026] When the pinch valve is in the closed state, the corresponding motor load threshold value P0 and the calibrated relative distance L0 between the first clamping body and the second clamping body are preset;

[0027] When the pinch valve is controlled to clamp the hose and close the pinch valve, the working parameters of the motor are detected and the corresponding motor load P is calculated. When the motor load P reaches the load threshold P0, the current relative distance L between the first clamping body and the second clamping body is obtained, and L is compared with the calibrated relative distance L0. If L>L0, it is determined that there is a foreign object in the hose.

[0028] In order to facilitate the passage of water into the pinch valve to flush the interior thereof, the pinch valve further comprises a hollow valve body, a hose is connected to the valve body, and a flushing port for connecting to a water source is provided on the valve body;

[0029] When it is determined that foreign matter exists in the hose, water is supplied from the flushing port into the hose to flush the hose.

[0030] The technical solution adopted by the present invention to solve the third technical problem is: a cleaning device, characterized in that: it includes a base station and a cleaning machine;

[0031] The base station is provided with a clean water tank, a water pump, a sewage tank, a fan, a first control module and the pinch valve according to claim 7, wherein the water pump, the fan and the motor, the distance detector and the signal acquisition circuit in the pinch valve are all electrically connected to the first control module;

[0032] The water pump is connected between the water outlet of the clean water tank and the flushing port of the clamp valve, the inlet of the sewage tank is connected to the free end of the hose, the fan is arranged downstream of the sewage tank, and the base station is provided with a first pair of interfaces that are connected to the valve body;

[0033] The cleaning machine is provided with a dirt separation chamber and a second control module, and the second control module is communicatively connected with the first control module;

[0034] A water level detector connected to the second control module by electrical signals is provided in the dirt separation chamber, and a second interface is provided on the cleaning machine corresponding to the outlet of the dirt separation chamber. The cleaning machine can be moved to the base station so that the second interface is connected to the first interface.

[0035] In order to realize the self-cleaning of the cleaning machine and the pinch valve, the following steps are adopted for self-cleaning work;

[0036] The cleaning machine moves to the base station so that the second pair of interfaces is connected to the first pair of interfaces;

[0037] The pinch valve is controlled to open, and the water pump is controlled to work so that the water in the clean water tank enters the pinch valve through the flushing port and flows into the separation chamber in the cleaning machine; the water level information in the separation chamber is detected, and when the water level in the separation chamber reaches a preset high water level threshold, the water pump is controlled to stop working; the fan is controlled to work so that the sewage in the separation chamber is sucked into the sewage tank through the pinch valve, so as to realize self-cleaning of the separation chamber and the pinch valve; when the water level in the separation chamber reaches a preset low water level threshold, the pinch valve is controlled to close, and the fan is controlled to stop working.

[0038] In order to timely discover the abnormal situation of the pinch valve and then facilitate its processing, when the pinch valve is controlled to be closed, the working parameters of the motor are detected and the corresponding motor load P is calculated. When the motor load P reaches the load threshold P0, the current relative distance L between the first clamping body and the second clamping body is obtained, and L is compared with the calibrated relative distance L0. If L>L0, it is determined that there is a foreign object in the hose.

[0039] This avoids the pinch valve from closing ineffectively or damaging the pinch valve. When it is determined that there is foreign matter in the hose, the pinch valve is self-cleaned according to the self-cleaning steps.

[0040] Compared with the prior art, the advantages of the present invention are: the clamping valve in the present invention uses a motor drive to clamp the hose, and the driving power is sufficient to meet the clamping requirements of large-diameter hoses; at the same time, the large-diameter hose can work under negative pressure conditions. In addition, the clamping valve is provided with a signal acquisition circuit for detecting the relative distance between the first clamping body and the second clamping body and for detecting the working parameters of the motor. In this way, based on the comparison of the distance data and the working parameters of the motor, it is possible to simply detect whether the hose can be closed and whether there are foreign objects in the hose, thereby achieving the purpose of timely discovering foreign objects in the hose and facilitating users to perform maintenance in a timely manner.

[0041] The pinch valve working method of the present invention can timely find the presence of foreign matter in the hose. On this basis, flushing can also be performed to prevent the pinch valve from being unable to close or being damaged by foreign matter.

[0042] The cleaning device of the present invention uses a pinch valve, which can timely detect whether there is foreign matter in the pinch valve, thereby avoiding the situation where the pipeline cannot be closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a pinch valve in an embodiment of the present invention.

[0044] Figure 2 It is a three-dimensional exploded view of the pinch valve in the embodiment of the present invention.

[0045] Figure 3 Schematic diagram of a cleaning device in an embodiment of the present invention. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below with reference to the accompanying drawings.

[0047] like Figure 1 and Figure 2 As shown, a pinch valve in this embodiment includes a valve body 8, a hose 1, a first clamping body 2, a second clamping body 3, a motor 4, a transmission mechanism 5, a distance sensor, and a signal acquisition circuit.

[0048] The valve body 8 is provided as a basic structure of the pinch valve. The valve body 8 is hollow and has a hole diameter consistent with that of the hose 1 . The hose 1 is connected to the valve body 8 .

[0049] The diameter of the hose 1 is specifically set according to the application environment of the clamp valve. In this embodiment, a large-diameter hose 1 that can be used in a cleaning device can be selected as needed. The hose 1 has a certain strength, so it is convenient to use in a negative pressure ring and will not automatically stick together due to the negative pressure environment. However, the large-diameter hose 1 requires greater power for clamping and closing.

[0050] The first clamping body 2 and the second clamping body 3 are relatively arranged on both sides of the hose 1, so that when the first clamping body 2 and the second clamping body 3 are relatively close to each other, the hose 1 is tightened and the hose 1 is in a disconnected and conductive state. When the first clamping body 2 and the second clamping body 3 are relatively far away from each other and the hose 1 is in its natural state, the hose 1 is conductive and other media can pass through the hose 1.

[0051] The transmission mechanism 5 is respectively connected to the motor 4, the first clamping body 2, and the second clamping body 3. The first clamping body 2 and the second clamping body 3 are driven by the motor 4 to move relatively close to squeeze the hose 1 to close the pinch valve, and relatively separate to release the hose 1 to open the pinch valve. In this embodiment, the motor 4 is used as a power source to drive the first clamping body 2 and the second clamping body 3 to move relative to each other. The power of the motor 4 is sufficient to ensure that the pinch valve can be closed and opened.

[0052] The transmission mechanism 5 in this embodiment specifically includes a gear 51 connected to the driving end of the motor 4, and a first rack 52 and a second rack 53 arranged on both sides of the gear 51 and meshing with the gear 51. The first rack 52 is connected to the first clamping body 2, and the second rack 53 is connected to the second clamping body 3. When working, the motor 4 is controlled to rotate forward or reverse, and the driving end of the motor 4 drives the gear 51 to rotate forward or reverse, and the first rack 52 and the second rack 53 move toward or away from each other based on the meshing connection relationship with the gear 51, thereby driving the first clamping body 2 and the second clamping body 3 to move relatively close to or away from each other, thereby realizing the closing and opening of the pinch valve.

[0053] The distance detector 6 is used to detect the relative distance between the first clamping body 2 and the second clamping body 3. The distance detector 6 can adopt various detection structures capable of realizing distance detection in the prior art. The distance detector 6 in this embodiment includes a first distance sensor 61 and a second distance sensor 62 which are arranged oppositely and spaced apart along the clamping direction. The first distance sensor 61 is connected to the first rack 52, and the second distance sensor 62 is connected to the second rack 53. When the first rack 52 and the second rack 53 move toward or away from each other, the first distance sensor 61 and the second distance sensor 62 will be driven to move synchronously, thereby causing the spacing between the first distance sensor 61 and the second distance sensor 62 to change. Then, according to the spacing between the first distance sensor 61 and the second distance sensor 62, the relative distance relationship between the first clamping body 2 and the second clamping body 3 can be judged, thereby determining the state of the pinch valve.

[0054] The signal acquisition circuit is electrically connected to the motor 4, and the signal acquisition circuit is used to detect the working parameters of the motor 4. When in use, the signal acquisition circuit can be electrically connected to the control module, and then the collected data is transmitted to the control module. In this embodiment, the signal acquisition circuit is electrically connected to the first control module 105 in the base station 100 described below.

[0055] In order to facilitate the assembly of the components of the pinch valve and the practical installation of the pinch valve, the pinch valve in this embodiment further includes a mounting seat 7, on which the motor 4 and the transmission mechanism 5 are both arranged, and the hose 1 is located beside the mounting seat 7 and between the first clamping body 2 and the second clamping body 3. In order to ensure safety in use, the mounting seat 7 in this embodiment includes an upper shell and a lower shell that are relatively buckled, and an installation cavity is formed after the upper shell and the lower shell are matched, and the motor 4 and the transmission mechanism 5 are both arranged in the installation cavity of the mounting seat 7. The first rack 52 and the second rack 53 are constrained on the mounting seat 7 so as to be movable along the clamping direction.

[0056] In order to ensure the stability of the movement of the first rack 52 and the second rack 53, and to ensure the reliability of the connection between the first rack 52 and the first clamping body 2, and the reliability of the connection between the second rack 53 and the second clamping body 3, the first frame 521 is slidably constrained on the mounting seat 7 along the clamping direction, the first rack 52 is vertically formed on the side of the first frame 521, and the end of the first clamping body 2 is connected to the end of the first frame 521 through a connecting rod 522. The second frame 531 is slidably constrained above the first frame 521 along the clamping direction, the second rack 53 is formed on the other side of the second frame 531, and the second clamping body 3 is connected to the end of the second frame 531. Based on the rotation of the gear 51, the first frame 521 is driven to move smoothly on the mounting seat 7, and the second frame 531 is driven to move smoothly on the first frame 521. In particular, when the hose 1 is squeezed, the first rack 52 and the second rack 53 will not be tilted due to the strength of the hose 1 itself, thereby ensuring the stability of movement.

[0057] In addition, in order to ensure the integrity of the hose 1 installed between the first clamping body 2 and the second clamping body 3, the independent installation of the hose 1 is avoided. In this embodiment, a first buffer sheet 11 is provided on the hose 1 at the clamping position corresponding to the first clamping body 2, and a rod body 111 is provided on the first buffer sheet 11 and is penetrated in the first clamping body 2 along the clamping direction. The rod body 111 can slide in the first clamping body 2 based on the movement of the first clamping body 2 without affecting the clamping of the hose 1, and also avoids the hose 1 from being separated from the first clamping body 2. A second buffer sheet 12 is provided on the hose 1 at the clamping position corresponding to the second clamping body 3, and the second buffer sheet 12 is connected to the second clamping body 3. In this way, the hose 1 is installed integrally between the first clamping body 2 and the second clamping body 3, so that the pinch valve is installed and used as an integral component.

[0058] The valve body 8 is provided with a flushing port 81 for connecting to a water source. Water can flow through the flushing port 81, thereby facilitating flushing of the pinch valve. In particular, when there is foreign matter in the hose 1, the foreign matter can be removed by flushing, thereby achieving conduction of the hose 1.

[0059] The aforementioned method for using the pinch valve includes the following steps: preset a corresponding load threshold value P0 of the motor 4 when the pinch valve is in a closed state, and a calibrated relative distance L0 between the first clamping body 2 and the second clamping body 3. P0 and L0 are test results when there is no foreign matter in the hose 1 of the pinch valve.

[0060] When the clamping valve is controlled to clamp the hose 1 and close the clamping valve, that is, based on the control of the motor 4, the first clamping body 2 and the second clamping body 3 are driven to move relatively close to each other under the drive of the transmission mechanism 5 to tighten the hose 1, the working parameters of the motor 4 are detected and obtained, and the corresponding motor 4 load P is calculated. When the motor 4 load P reaches the load threshold P0, if there is no foreign matter in the hose 1, the distance between the corresponding first clamping body 2 and the second clamping body 3 will be reduced to or below the calibrated relative distance L0. Based on this, the current relative distance L between the first clamping body 2 and the second clamping body 3 is obtained at the same time, and L is compared with the calibrated relative distance L0. If L>L0, that is, the load of the motor 4 has reached the load when the clamping valve is closed, but the distance between the first clamping member and the second clamping member is greater than the corresponding L0 when the clamping valve is closed, it is judged that there is foreign matter in the hose 1. Based on this judgment structure, the handling method of foreign matter can be determined based on different application product environments of the clamping valve.

[0061] In this embodiment, when it is determined that there is foreign matter in the hose 1 , water is supplied from the flushing port 81 into the hose 1 to flush the hose 1 , thereby discharging the foreign matter in the hose 1 , thereby avoiding the situation where the pinch valve cannot be closed or the hose 1 is closed.

[0062] The aforementioned pinch valve and the pinch valve use method can be applied to various environments where the valve body 8 is required. However, the pinch valve in this embodiment uses the motor 4 to drive the hose 1, and the driving power is sufficient to meet the clamping requirements of the large-diameter hose 1; at the same time, the large-diameter hose 1 can work under negative pressure conditions. In addition, the pinch valve is provided with a signal acquisition circuit for detecting the relative distance between the first clamping body 2 and the second clamping body 3 and for detecting the working parameters of the motor 4. In this way, based on the comparison of the distance data and the working parameters of the motor 4, it is possible to simply detect whether the hose 1 can be closed and whether there are foreign objects in the hose 1, thereby achieving the purpose of timely discovering foreign objects in the hose 1 and facilitating users to perform maintenance in a timely manner.

[0063] The pinch valve working method of the present invention can timely detect the presence of foreign matter in the hose 1. On this basis, flushing can also be performed to prevent the pinch valve from being unable to close or being damaged by foreign matter.

[0064] like Figure 3 As shown, the present invention also relates to a cleaning device, comprising a base station 100 and a cleaning machine 200 .

[0065] The base station 100 is provided with a clean water tank 101, a water pump 102, a sewage tank 103, a fan 104, a first control module 105 and the aforementioned pinch valve. The water pump 102, the fan 104 and the motor 4, the distance detector 6 and the signal acquisition circuit in the pinch valve are all electrically connected to the first control module 105. The water pump 102 is connected between the water outlet of the clean water tank 101 and the flushing port 81 of the pinch valve, the inlet of the sewage tank 103 is connected to the free end of the hose 1, the fan 104 is arranged downstream of the sewage tank 103, and the base station 100 is provided with a first docking port 106 docked to the valve body 8.

[0066] The cleaning machine 200 is provided with a dirt separation chamber 201 and a second control module 202, and the second control module 202 is in communication with the first control module 105. A water level detector 203 is provided in the dirt separation chamber 201 and is in electrical signal connection with the second control module 202. The cleaning machine 200 is provided with a second docking port 204 corresponding to the outlet of the dirt separation chamber 201. The cleaning machine 200 can be moved to the base station 100 so that the second docking port 204 is docked with the first docking port 106.

[0067] The cleaning device performs self-cleaning in the following steps. Specifically, the steps include: the cleaning machine 200 moves to the base station 100 so that the second docking port 204 is docked with the first docking port 106; the clamp valve is controlled to open, and the water pump 102 is controlled to work so that the water in the clean water tank 101 enters the clamp valve through the flushing port 81 and flows into the separation chamber in the cleaning machine 200; the water level information in the separation chamber is detected, and when the water level in the separation chamber reaches the preset high water level threshold, the water pump 102 is controlled to stop working; the fan 104 is controlled to work so that the sewage in the separation chamber is sucked into the sewage tank 103 through the clamp valve to realize the self-cleaning of the separation chamber and the clamp valve; when the water level in the separation chamber reaches the preset low water level threshold, the clamp valve is controlled to close, and the fan 104 is controlled to stop working.

[0068] When controlling the closing of the pinch valve, the working parameters of the motor 4 are detected and obtained and the corresponding load P of the motor 4 is calculated. When the load P of the motor 4 reaches the load threshold value P0, the relative distance L between the current first clamping body 2 and the second clamping body 3 is obtained, and L is compared with the calibrated relative distance L0. If L>L0, it is determined that there is a foreign object in the hose 1, otherwise, it is determined that there is no foreign object in the hose 1. When it is determined that there is a foreign object in the hose 1, the pinch valve is self-cleaned according to the steps of the self-cleaning work. The above-mentioned cleaning work of the pinch valve is cyclically performed until it is determined that there is no foreign object in the hose 1 or the set number of cycles is reached.

[0069] The cleaning device of the present invention uses a pinch valve, which can timely detect whether there is foreign matter in the pinch valve, thereby avoiding the situation where the pipeline cannot be closed.

[0070] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A pinch valve, comprising Hose (1); A first clamping body (2) is arranged on one side of the hose (1); A second clamping body (3) is arranged on the other side of the hose (1) relative to the first clamping body (2); Features: Also includes Motor (4); The transmission mechanism (5) is respectively connected to the motor (4), the first clamping body (2), and the second clamping body (3) in transmission connection, and driven by the motor (4) to drive the first clamping body (2) and the second clamping body (3) to move closer to each other to squeeze the hose (1), and to move away from each other to release the hose (1); A distance detector (6) is used to detect the relative distance between the first clamping body (2) and the second clamping body (3); The signal acquisition circuit is connected to the electrical signal of the motor (4) and is used to detect the working parameters of the motor (4).

2. The pinch valve according to claim 1, characterized in that: The transmission mechanism (5) comprises a gear (51) connected to the driving end of the motor (4), and a first rack (52) and a second rack (53) arranged on both sides of the gear (51) and meshing with the gear (51), the first rack (52) being connected to the first clamping body (2), and the second rack (53) being connected to the second clamping body (3).

3. The pinch valve according to claim 2, characterized in that: The distance detector (6) comprises a first distance sensor (61) and a second distance sensor (62) which are arranged opposite to each other and spaced apart along the clamping direction; the first distance sensor (61) is connected to the first rack (52), and the second distance sensor (62) is connected to the second rack (53).

4. The pinch valve according to claim 2, characterized in that: It also includes a mounting seat (7), the motor (4) and the transmission mechanism (5) are both arranged on the mounting seat (7), and the first rack (52) and the second rack (53) are movably constrained on the mounting seat (7) along the clamping direction.

5. The pinch valve according to claim 4, characterized in that: A first frame (521) is slidably constrained on the mounting seat (7) along the clamping direction, the first rack (52) is formed on the first frame (521), and the end of the first clamping body (2) is connected to the end of the first frame (521) via a connecting rod (522); A second frame (531) is slidably constrained above the first frame (521) along a clamping direction, the second rack (53) is formed on the second frame (531), and the second clamping body (3) is connected to the end of the second frame (531).

6. The pinch valve according to claim 1, characterized in that: A first buffer sheet (11) is provided on the hose (1) at a clamping position corresponding to the first clamping body (2), and a rod body (111) is provided on the first buffer sheet (11) and is inserted into the first clamping body (2) along the clamping direction; A second buffer sheet (12) is provided on the hose (1) at a clamping position corresponding to the second clamping body (3), and the second buffer sheet (12) is connected to the second clamping body (3).

7. The pinch valve according to any one of claims 1 to 6, characterized in that: It also comprises a hollow valve body (8), the hose (1) is connected to the valve body (8), and the valve body (8) is provided with a flushing port (81) for connecting to a water source.

8. A method for using a pinch valve, characterized in that: Using the pinch valve as claimed in any one of claims 1 to 7; The method of using the pinch valve includes the following steps: When the pinch valve is in a closed state, the corresponding motor (4) load threshold value P0 and the calibrated relative distance L0 between the first clamping body (2) and the second clamping body (3) are preset; When the pinch valve is controlled to clamp the hose (1) and the pinch valve is closed, the working parameters of the motor (4) are detected and obtained, and the corresponding load P of the motor (4) is calculated. When the load P of the motor (4) reaches a load threshold value P0, the current relative distance L between the first clamping body (2) and the second clamping body (3) is obtained, and L is compared with the calibrated relative distance L0. If L>L0, it is determined that a foreign object exists in the hose (1).

9. The method for using the pinch valve according to claim 8, characterized in that: The pinch valve further comprises a hollow valve body (8), the hose (1) is connected to the valve body (8), and the valve body (8) is provided with a flushing port (81) for connecting to a water source; When it is determined that foreign matter exists in the hose (1), water is supplied from the flushing port (81) into the hose (1) to flush the hose (1).

10. A cleaning device, characterized in that: It comprises a base station (100) and a cleaning machine (200); The base station (100) is provided with a clean water tank (101), a water pump (102), a sewage tank (103), a fan (104), a first control module (105) and the pinch valve according to claim 7, wherein the water pump (102), the fan (104) and the motor (4), the distance detector (6) and the signal acquisition circuit in the pinch valve are all electrically connected to the first control module (105); The water pump (102) is connected between the water outlet of the clean water tank (101) and the flushing port (81) of the pinch valve, the inlet of the sewage tank (103) is connected to the free end of the hose (1), the fan (104) is arranged downstream of the sewage tank (103), and the base station (100) is provided with a first port (106) connected to the valve body (8); The cleaning machine (200) is provided with a dirt separation chamber (201) and a second control module (202), and the second control module (202) is communicatively connected with the first control module (105); A water level detector (203) electrically connected to the second control module (202) is provided in the dirt separation chamber (201); a second docking port (204) is provided on the cleaning machine (200) corresponding to the outlet of the dirt separation chamber (201); the cleaning machine (200) can be moved to the base station (100) so that the second docking port (204) is docked with the first docking port (106).

11. The cleaning device according to claim 10, characterized in that: Use the following steps to perform self-cleaning work; The cleaning machine (200) moves to the base station (100) so that the second interface (204) is connected to the first interface (106); The pinch valve is controlled to open, and the water pump (102) is controlled to operate so that water in the clean water tank (101) enters the pinch valve through the flushing port (81) and flows into the separation chamber in the cleaning machine (200); water level information in the separation chamber is detected, and when the water level in the separation chamber reaches a preset high water level threshold, the water pump (102) is controlled to stop operating; the fan (104) is controlled to operate so that sewage in the separation chamber is sucked into the sewage tank (103) through the pinch valve, thereby achieving self-cleaning of the separation chamber and the pinch valve; when the water level in the separation chamber reaches a preset low water level threshold, the pinch valve is controlled to close, and the fan (104) is controlled to stop operating.

12. The cleaning device according to claim 11, characterized in that: When controlling the closing of the pinch valve, the working parameters of the motor (4) are detected and obtained, and the corresponding load P of the motor (4) is calculated. When the load P of the motor (4) reaches a load threshold value P0, the current relative distance L between the first clamping body (2) and the second clamping body (3) is obtained, and L is compared with the calibrated relative distance L0. If L>L0, it is determined that a foreign object exists in the hose (1).

13. The cleaning device according to claim 12, characterized in that: When it is determined that foreign matter exists in the hose (1), the pinch valve is self-cleaned according to the self-cleaning operation procedure.

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