Manual emergency pump

Abstract

The utility model relates to a manual emergency pump. The manual emergency pump comprises a body, a first piston rod, a second piston rod, a forward one-way valve and a reverse one-way valve. When the manual emergency pump needs to be used in emergency in a hydraulic system, only the first piston rod and the second piston rod need to be pushed or pulled, so that the oil inlet hole, the first oil duct, the first channel, the second channel, the second oil duct and the oil outlet hole are communicated in sequence, and the working mode of the manual emergency pump is switched to a manual mode; manual emergency use of the manual emergency pump in a hydraulic system is facilitated; when the hydraulic system can normally and automatically operate, the first channel and the second channel are disconnected by pushing or pulling the first piston rod and the second piston rod, so that the working mode of the manual emergency pump is switched to the automatic mode, and oil in the hydraulic system can conveniently pass through the manual emergency pump under the action of the hydraulic pump. The manual emergency pump has the advantages of being compact in structure, small in size and more convenient and simpler to use.

Description

Technical Field

[0001] The utility model relates to the technical field of manual pump equipment, in particular to a manual emergency pump. Background Art

[0002] A hydraulic manual pump is a small hydraulic pump that can convert manual mechanical energy into hydraulic energy. It is usually used for temporary emergency when the hydraulic system loses power or the hydraulic pump loses power. It uses human power as the driving force. Generally, a manual pump is independently arranged with a manual switching valve, and the operation is very inconvenient. Content of the Utility Model

[0003] Based on this, it is necessary to provide a manual emergency pump with a compact structure, a small volume, convenient use and capable of reducing unnecessary labor.

[0004] A manual emergency pump, comprising:

[0005] A body having opposite first and second ends; an operation cavity is provided inside the body; an installation hole is formed in the end face of the first end; an oil inlet hole and an oil outlet hole are spaced apart from each other at the second end; mutually independent first and second oil channels are provided inside the body; one ends of the first oil channel and the second oil channel are respectively communicated with the oil inlet hole and the oil outlet hole;

[0006] A first piston rod, comprising a rod body having a sliding hole and a piston block provided at one end of the rod body; the piston block is slidably installed in the operation cavity to divide the operation cavity into a first chamber communicated with the installation hole and a second chamber communicated with both the oil inlet hole and the oil outlet hole; one end of the rod body is slidably inserted through the installation hole; a first channel and a second channel are formed at one end of the rod body close to the piston block; one ends of the first channel and the second channel are both communicated with the sliding hole, and the openings of the other ends are both located on the outer surface of the rod body; the rod body can operably drive the piston block to slide in the operation cavity so that the first channel and the second channel are respectively communicated with or disconnected from the first oil channel and the second oil channel;

[0007] A second piston rod, one end of which is slidably inserted through the sliding hole; the second piston rod can operably slide in the sliding hole to block or conduct the first channel and the second channel;

[0008] A forward one-way valve, which is hermetically installed in the oil inlet hole and is located between the opening of the first oil channel in the oil inlet hole and the second chamber;

[0009] A reverse one-way valve, which is hermetically installed in the oil outlet hole and is located between the opening of the second oil channel in the oil outlet hole and the second chamber.

[0010] In one embodiment, the body is a columnar structure; the oil inlet hole and the mounting hole are respectively located at the end faces of the first end and the second end; the oil outlet hole is located on the side surface of the body;

[0011] A first hole section is provided on the end face of the second end; a second hole section communicating with the oil outlet hole is provided on the end face of the second end; a third hole section, a fourth hole section and a fifth hole section are spaced apart on the side surface of the body; the third hole section sequentially communicates with the first hole section and the oil inlet hole, the fourth hole section sequentially communicates with the first hole section and the first chamber to form the first oil passage; the fifth hole section sequentially communicates with the second hole section and the second chamber to form the second oil passage;

[0012] Plug heads are hermetically installed at the openings of the first hole section, the second hole section, the third hole section, the fourth hole section and the fifth hole section on the surface of the body.

[0013] In one embodiment, it further includes a first joint body; one end of the first joint body is hermetically installed in the mounting hole and extends into the first chamber; one end of the first joint body near the second end has a first oil passage hole and a second oil passage hole; one ends of the first oil passage hole and the second oil passage hole are respectively communicated with the first oil passage and the second oil passage, and the other ends can be respectively communicated with the first passage and the second passage; one end of the rod body is slidably inserted into the first joint body; the end face of the first joint body facing the second end can be in contact with the piston block.

[0014] In one embodiment, a first annular groove and a second annular groove are formed at intervals on the outer wall of the first joint body; a third annular groove and a fourth annular groove are formed at intervals on the inner wall of the first joint body; the two ends of the first oil passage hole are respectively opened in the first annular groove and the third annular groove; the two ends of the second oil passage hole are respectively opened in the second annular groove and the fourth annular groove.

[0015] In one embodiment, a first annular seal and a second annular seal are sleeved on the first joint body; the first annular seal is clamped between the first joint body and the opening edge of the mounting hole; the second annular seal is clamped between the first joint body and the inner wall of the first chamber and is located between the first oil passage hole and the second oil passage hole.

[0016] In one embodiment, a third annular seal is provided between the rod body and the inner wall of the first joint body; the inner wall of the third annular seal is in sliding contact with the outer wall of the rod body.

[0017] In one embodiment, a fourth annular seal is sleeved on the second piston rod; the outer wall of the fourth annular seal is in sliding contact with the inner wall of the sliding hole.

[0018] In one of the embodiments, a first hand-held handle is further included; the first hand-held handle is arranged at an end of the rod body away from the piston block along the circumference of the sliding hole and is located outside the main body.

[0019] In one embodiment, a second hand-held handle is installed at the end of the second piston rod located outside the sliding hole.

[0020] In one of the embodiments, it also includes a second joint body; one end of the second joint body is sealed and installed in the sliding hole; the second piston rod includes a switching head, a guide section and a connecting section connected in sequence; the diameter of the guide section is larger than the diameters of the guide section and the switching head respectively; the end face of the switching head away from the guide section is a conical surface; the guide section is in sliding contact with the inner wall of the sliding hole; the end of the connecting section away from the guide section can be slidably penetrated in the second joint body and extend to the outside of the second joint body; the conical surface of the switching head abuts or separates from the opening edge of the first channel at one end in the sliding hole to block or conduct the first channel and the second channel.

[0021] The above-mentioned manual emergency pump connects the oil inlet and oil outlet of the main body to the pipeline of the hydraulic system to realize the connection of the manual emergency pump in the hydraulic system. When the manual emergency pump needs to be used in an emergency in the hydraulic system, the staff only needs to push or pull the first piston rod and the second piston rod to switch the working mode of the manual emergency pump to the manual mode, so as to facilitate the manual emergency use of the manual emergency pump in the hydraulic system; when the hydraulic system can operate normally and automatically, the staff pushes or pulls the first piston rod and the second piston rod to switch the working mode of the manual emergency pump to the automatic mode, so as to facilitate the oil in the hydraulic system to pass through the manual emergency pump under the action of the hydraulic pump. Therefore, the above-mentioned manual emergency pump does not need to be temporarily connected to the hydraulic system, and the operation is simple and convenient. At the same time, the manual switching valve and the manual pump are integrated together, which has the advantages of compact structure and small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of a manual emergency pump in a preferred embodiment of the utility model when it is in automatic mode;

[0023] Figure 2 This is a structural schematic diagram of a manual emergency pump in a preferred embodiment of the utility model when it is in manual mode;

[0024] Figure 3 for Figure 1 andFigure 2 Schematic structural diagram of the body in the manual emergency pump shown

[0025] Figure 4 For Figure 1 and Figure 2 Schematic structural diagram of the first piston rod in the manual emergency pump shown

[0026] Figure 5 For Figure 1 and Figure 2 Schematic structural diagram of the first joint body in the manual emergency pump shown

[0027] Figure 6 For Figure 1 and Figure 2 Schematic structural diagram of the second piston rod in the manual emergency pump shown

[0028] Label description: 100, manual emergency pump; 110, body; 111, first end; 112, second end; 113, operation chamber; 1131, first chamber; 1132, second chamber; 114, mounting hole; 115, oil inlet hole; 116, oil outlet hole; 117, first oil passage; 1171, first hole section; 1172, third hole section; 1173, fourth hole section; 118, second oil passage; 1181, second hole section; 1182, fifth hole section; 120, first piston rod; 121, rod body; 1211, sliding hole; 1212, first channel; 1213, second channel; 122, piston block; 130, second piston rod; 131, switching head; 1311, conical surface; 132, guiding section; 133, connecting section; 140, forward one-way valve; 150, reverse one-way valve; 160, plug; 170, first joint body; 171, first oil passing hole; 172, second oil passing hole; 173, first annular groove; 174, second annular groove; 175, third annular groove; 176, fourth annular groove; 181, first annular seal; 182, second annular seal; 183, third annular seal; 184, fourth annular seal; 185, fifth annular seal; 190, first hand grip; 201, second hand grip; 202, second joint body. Detailed implementation manners

[0029] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the specification of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0031] When describing positional relationships, unless otherwise specified, when an element is referred to as being "on" another element, it can be directly on the other element or an intermediate element may also exist. It can also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements, or one or more intermediate elements may also exist.

[0032] In the case of using "comprising", "having", and "including" as described herein, unless explicit limiting terms are used, such as "only", "consisting of", etc., another component can also be added. Unless otherwise mentioned, terms in the singular form can include the plural form and should not be understood as having a quantity of one.

[0033] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the components are only drawn by way of example in the drawings and not necessarily to the true scale.

[0034] Figure 1 and Figure 2 This is the structure of the manual emergency pump in two working modes in an embodiment of this utility model. For ease of illustration, the drawings only show the structures related to the embodiments of this utility model.

[0035] Please refer to Figure 1 and Figure 2 In a preferred embodiment of this utility model, the manual emergency pump 100 includes a body 110, a first piston rod 120, a second piston rod 130, a forward check valve 140, and a reverse check valve 150.

[0036] Please refer to together Figure 3, the body 110 has opposite first end 111 and second end 112. Inside the body 110 is an operation cavity 113. An installation hole 114 is provided on the end face of the first end 111. Oil inlet holes 115 and oil outlet holes 116 are spaced apart on the second end 112. Inside the body 110 are independent first oil passage 117 and second oil passage 118. One ends of the first oil passage 117 and the second oil passage 118 are respectively communicated with the oil inlet hole 115 and the oil outlet hole 116. Among them, the oil inlet hole 115 and the oil outlet hole 116 can be on the same surface of the second end 112 or on two different surfaces. For the convenience of connecting the pipelines of the hydraulic system, in the present utility model, the oil inlet hole 115 and the oil outlet hole 116 are respectively on two different surfaces. It should be noted that the diameter of the installation hole 114 can be greater than, equal to, or slightly less than the diameter of the operation cavity 113.

[0037] Please refer to Figure 4 , the first piston rod 120 includes a rod body 121 having a sliding hole 1211 and a piston block 122 provided at one end of the rod body 121. The piston block 122 is slidably installed in the operation cavity 113 to divide the operation cavity 113 into a first chamber 1131 communicated with the installation hole 114 and a second chamber 1132 communicated with both the oil inlet hole 115 and the oil outlet hole 116. One end of the rod body 121 is hermetically and slidably passed through the installation hole 114. A first passage 1212 and a second passage 1213 are formed at one end of the rod body 121 close to the piston block 122. One ends of the first passage 1212 and the second passage 1213 are both communicated with the sliding hole 1211, and the openings at the other ends are both on the outer surface of the rod body 121. The rod body 121 can operably drive the piston block 122 to slide in the operation cavity 113, so that the first passage 1212 and the second passage 1213 are respectively communicated with or disconnected from the first oil passage 117 and the second oil passage 118.

[0038] Among them, the piston block 122 can be a hard material of the same material as the rod body 121, or an elastic piston material such as rubber, and the piston block 122 can be formed separately from the rod body 121 or integrally formed with the rod body 121.

[0039] One end of the second piston rod 130 is slidably passed through the sliding hole 1211. The second piston rod 130 can operably slide in the sliding hole 1211 to block or conduct the first passage 1212 and the second passage 1213.

[0040] The forward one-way valve 140 is hermetically installed in the oil inlet hole 115 and is located between the opening of the first oil passage 117 in the oil inlet hole 115 and the second chamber 1132. The reverse one-way valve 150 is hermetically installed in the oil outlet hole 116 and is located between the opening of the second oil passage 118 in the oil outlet hole 116 and the second chamber 1132.

[0041] Among them, the function of the forward check valve 140 is to ensure that the hydraulic oil can only flow from the oil inlet hole 115 towards the second chamber 1132, and not vice versa; the function of the reverse check valve 150 is to ensure that the hydraulic oil can only flow from the second chamber 1132 towards the oil outlet hole 116, and not vice versa. In this way, it can be ensured that when the piston block 122 slides in the operation chamber 113, the hydraulic oil in the second chamber 1132 will not be pushed out from the oil inlet hole 115, or the hydraulic oil in the hydraulic system will not be sucked into the second chamber 1132 from the oil outlet hole 116.

[0042] In practical applications, the oil inlet hole 115 and the oil outlet hole 116 of the main body 110 are connected to the pipeline of the hydraulic system to realize the connection of the manual emergency pump 100 in the hydraulic system. When faults such as power failure of the hydraulic system or loss of power of the hydraulic pump occur, the manual emergency pump 100 can be directly switched for use without the need for temporary connection to the hydraulic system, and the operation is relatively simple.

[0043] The working modes of the manual emergency pump 100 include a manual mode and an automatic mode. When the hydraulic system is working normally, the operator pushes or pulls the first piston rod 120, so that the first oil passage 117 and the second oil passage 118 are respectively connected to the first passage 1212 and the second passage 1213. By pulling the first piston rod 120 until the first passage 1212 and the second passage 1213 are connected through the sliding hole 1211, at this time, the oil inlet hole 115, the first oil passage 117, the first passage 1212, the sliding hole 1211, the second passage 1213, the second oil passage 118 and the oil outlet hole 116 are connected in sequence to form the first oil passage of the manual emergency pump 100, so as to ensure that the hydraulic oil in the entire hydraulic system can smoothly pass through the manual emergency pump 100 under the action of the hydraulic pump (the flow path of the hydraulic oil in the manual emergency pump 110 is as shown by the dotted arrow in Figure 1 ), and at this time the manual emergency pump 100 is in the automatic mode;

[0044] When faults such as power failure of the hydraulic system or loss of power of the hydraulic pump occur, the staff pushes the second piston rod 130 until the second piston rod 130 blocks the first passage 1212 and the second passage 1213, thereby cutting off the first oil passage, so as to switch the working mode of the manual emergency pump 100 to the manual mode. At this time, the staff manually presses and pulls the rod body 121 repeatedly to drive the piston block 122 to slide repeatedly in the operation chamber 113, so as to quickly reduce or increase the volume of the second chamber 1132, suck the hydraulic oil in the hydraulic system into the second chamber 1132 through the oil inlet hole 115, and then push it out through the oil outlet hole 116. At this time, the flow path of the hydraulic oil is as shown by the dotted arrow in Figure 2 ), realizing the manual emergency use of the manual emergency pump 100 in the hydraulic system.

[0045] Therefore, when the manual emergency pump 100 needs to be used emergently in the hydraulic system, the staff only needs to push or pull the first piston rod 120 and the second piston rod 130 to switch the working mode of the manual emergency pump 100 to the manual mode, so as to facilitate the manual emergency use of the manual emergency pump 100 in the hydraulic system; when the hydraulic system can operate automatically normally, the staff pushes or pulls the first piston rod 120 and the second piston rod 130 to switch the working mode of the manual emergency pump 100 to the automatic mode, so as to facilitate the oil in the hydraulic system to smoothly pass through the manual emergency pump 100 under the action of the hydraulic pump, and the operation is more convenient and simple.

[0046] Therefore, the above-mentioned manual emergency pump 100 integrates the manual switching valve and the manual pump, so the manual emergency pump 100 has the advantages of compact structure, small volume, and very convenient and simple operation.

[0047] In some embodiments, the body 110 is a columnar structure. The oil inlet hole 115 and the installation hole 114 are respectively located on the end faces of the first end 111 and the second end 112. The oil outlet hole 116 is located on the side surface of the body 110. A first hole section 1171 is formed on the end face of the second end 112. A second hole section 1181 communicating with the oil outlet hole 116 is formed on the end face of the first end 111. Third hole sections 1172, fourth hole sections 1173 and fifth hole sections 1182 are spaced apart on the side surface of the body 110. The third hole section 1172 communicates with the first hole section 1171 and the oil inlet hole 115 in sequence, and the fourth hole section 1173 communicates with the first hole section 1171 and the first chamber 1131 in sequence to form a first oil passage 117. The fifth hole section 1182 communicates with the second hole section 1181 and the second chamber 1132 in sequence to form a second oil passage 118. Plug heads 160 are hermetically installed at the openings of the first hole section 1171, the second hole section 1181, the third hole section 1172, the fourth hole section 1173 and the fifth hole section 1182 on the surface of the body 110.

[0048] In this way, the third hole section 1172, the first hole section 1171 and the fourth hole section 1173 communicate with each other in sequence to form a first oil passage 117, and the second hole section 1181 communicates with the fifth hole section 1182 to form a second oil passage 118, while each plug head 160 is to prevent the oil from leaking out from the openings of the respective hole sections on the surface of the body 110 and ensure the integrity of the first oil passage 117 and the second oil passage 118.

[0049] During the processing of the main body 110, only three drilling operations are required on the main body 110 to form the first oil channel 117 in the main body 110, and three drilling operations are required on the main body 110 to form the second oil channel 118 in the main body 110. Therefore, the first oil channel 117 is set as the first hole section 1171, the third hole section 1172 and the fourth hole section 1173, and is formed in three times, and the second oil channel 118 is set as the second hole section 1181 and the fifth hole section 1182, and is formed in two times, so as to greatly reduce the processing difficulty of the first oil channel 117 and the second oil channel 118.

[0050] Please also read Figure 5 In some embodiments, the manual emergency pump 100 further includes a first joint body 170. One end of the first joint body 170 is sealed and installed in the mounting hole 114 and extends into the first chamber 1131. The end of the first joint body 170 close to the second end 112 has a first oil hole 171 and a second oil hole 172. One end of the first oil hole 171 and the second oil hole 172 are respectively connected to the first oil passage 117 and the second oil passage 118, and the other end is respectively connected to the first channel 1212 and the second channel 1213. The rod body 121 is slidably disposed in the first joint body 170. The end surface of the first joint body 170 facing the second end 112 can contact the piston block 122.

[0051] In actual use, the first oil hole 171 and the second oil hole 172 are located at one end of the inner wall of the first joint body 170, respectively aligned with or completely staggered with the first oil passage 117 and the second oil passage 118 on the surface of the rod body 121, so as to achieve the purpose of connecting or disconnecting the first oil hole 171 and the second oil hole 172 with the first channel 1212 and the second channel 1213, respectively, so as to switch the working mode of the manual emergency pump 100 to the automatic mode or the manual mode. Moreover, when the first oil hole 171 and the second oil hole 172 are connected with the first channel 1212 and the second channel 1213, respectively, the end surface of the first joint body 170 facing the second end 112 contacts the piston block 122, which not only limits the piston block 122, but also ensures that the first channel 1212 and the second channel 1213 can be accurately aligned and connected with the first oil hole 171 and the second oil hole 172 when the manual emergency pump 100 is switched to the automatic mode, so as to ensure stable and reliable switching of the working mode.

[0052] The setting of the first joint body 170 not only guides the sliding trajectory of the rod body 121 to ensure high movement accuracy of the first piston rod 120, but also limits the piston block 122 to prevent the piston block 122 from sliding out of the body 110 during the switching of the working mode of the manual emergency pump 100, thereby improving the safety of the manual emergency pump 100.

[0053] Specifically, the first joint body 170 is detachably installed in the mounting hole 114 to facilitate the disassembly and assembly of components such as the piston block 122 in the operation cavity 113 and the cleaning and maintenance of the manual emergency pump 100.

[0054] Further, in some embodiments, the outer wall of the first joint body 170 is spaced apart to form a first annular groove 173 and a second annular groove 174. The inner wall of the first joint body 170 is spaced apart to form a third annular groove 175 and a fourth annular groove 176. The two ends of the first oil passage hole 171 are respectively opened in the first annular groove 173 and the third annular groove 175. The two ends of the second oil passage hole 172 are respectively opened in the second annular groove 174 and the fourth annular groove 176.

[0055] Among them, the first oil passage hole 171 and the second oil passage hole 172 can be one or multiple. When the first oil passage hole 171 and the second oil passage hole 172 are multiple, the multiple first oil passage holes 171 and the multiple second oil passage holes 172 are all arranged at intervals along the circumferential direction of the first joint body 170.

[0056] When the manual emergency pump 100 is in the automatic mode, the opening at one end of the first oil passage 117 in the first chamber 1131 is aligned with the first annular groove 173, the opening at one end of the first passage 1212 on the surface of the rod body 121 is aligned with the third annular groove 175, the opening at one end of the second oil passage 118 in the mounting hole 114 is aligned with the second annular groove 174, and the opening at one end of the second passage 1213 on the surface of the rod body 121 is aligned with the fourth annular groove 176. In this way, it can be ensured that no matter how the circumferential position of the first joint body 170 in the mounting hole 114 changes, the first oil passage hole 171 can be respectively communicated with the first oil passage 117 and the first passage 1212, and the second oil passage hole 172 can be respectively communicated with the second oil passage 118 and the second passage 1213 in the automatic mode of the manual emergency pump 100, further improving the operation simplicity of the manual emergency pump 100 and reducing the assembly difficulty of the manual emergency pump 100 at the same time.

[0057] Specifically, the opening of the first passage 1212 on the surface of the rod body 121 can be multiple, and the multiple openings of the first passage 1212 on the surface of the rod body 121 are arranged at intervals along the circumferential direction of the rod body 121. When the manual emergency pump 100 is in the automatic mode, the third annular groove 175 is aligned with each opening of the first passage 1212 on the surface of the rod body 121; the second passage 1213 can be multiple, and the multiple second passages 1213 are arranged at intervals along the circumferential direction of the rod body 121. When the manual emergency pump 100 is in the automatic mode, the fourth annular groove 176 is aligned with each opening of the second passage 1213 on the surface of the rod body 121.

[0058] Further, in some embodiments, a first annular seal 181 and a second annular seal 182 are sleeved on the first joint body 170. The first annular seal 181 is clamped between the first joint body 170 and the opening edge of the mounting hole 114. The second annular seal 182 is clamped between the first joint body 170 and the inner wall of the first chamber 1131 and is located between the first oil passage hole 171 and the second oil passage hole 172. Specifically, when the first annular groove 173 and the second annular groove 174 are formed on the surface of the first joint body 170, the second annular seal 182 is located between the first annular groove 173 and the second annular groove 174.

[0059] The first annular seal 181 is used to seal between the first joint body 170 and the mounting hole 114, so as to reduce the probability that the oil at the connection of the first passage 1212 and the second oil passage 118 leaks out between the inner walls of the first joint body 170 and the mounting hole 114. The second annular seal 182 is used to seal between the first joint body 170 and the inner wall of the first chamber 1131, so as to reduce the probability that the oil at the connection between the first oil passage 117 and the first passage 1212 leaks out along the outer wall of the first joint body 170, improving the sealing performance of the above-mentioned manual emergency pump 100.

[0060] Further, in some embodiments, a third annular seal 183 is arranged between the rod body 121 and the inner wall of the first joint body 170. The inner wall of the third annular seal 183 is in sliding contact with the outer wall of the rod body 121. The third annular seal 183 is used to seal between the rod body 121 and the inner wall of the first joint body 170, so as to reduce the probability of oil leakage between the rod body 121 and the inner wall of the first joint body 170, further improving the sealing performance of the manual emergency pump 100.

[0061] A fourth annular seal 184 is sleeved on the piston block 122. The outer wall of the fourth annular seal 184 is in sliding contact with the inner wall of the operation chamber 113. The fourth annular seal 184 is used to seal between the piston block 122 and the inner wall of the operation chamber 133 to prevent oil from leaking between the first chamber 1131 and the second chamber 1132, further improving the density performance of the manual emergency pump 100.

[0062] Further, in some embodiments, a fifth annular seal 185 is sleeved on the second piston rod 130. The outer wall of the fifth annular seal 185 is in sliding contact with the inner wall of the sliding hole 1211. The fifth annular seal 185 is used to seal between the second piston rod 130 and the inner wall of the sliding hole 1211, so as to reduce the probability of oil leakage between the second piston rod 130 and the sliding hole 1211, further improving the sealing performance of the manual emergency pump 100.

[0063] It should be noted that the structures of the first annular seal 181, the second annular seal 182, the third annular seal 183, the fourth annular seal 184 and the fifth annular seal 185 can be the same or different. Their structures can be a single sealing ring structure such as an O-ring, a Y-shaped sealing ring, a lip-shaped sealing ring, etc., or a combined sealing structure formed by two different sealing rings, such as a combined structure of an O-ring and a lip-shaped sealing ring, a combined structure of an O-ring and a rectangular sealing ring, etc.

[0064] In some embodiments, the manual emergency pump 100 further includes a first hand-held handle 190. The first hand-held handle 190 is disposed at an end of the rod body 121 away from the piston block 122 along the circumference of the slide hole 1211 and is located outside the body 110. Therefore, the first hand-held handle 190 is an annular structure disposed along the circumference of the slide hole 1211. The provision of the first hand-held handle 190 facilitates the staff to grasp the rod body 121 to push and pull, making the operation of the manual emergency pump 100 easier.

[0065] In some embodiments, a second hand-held handle 201 is installed at the end of the second piston rod 130 located outside the sliding hole 1211. In actual use, the staff can grasp the second hand-held handle 201 to push and pull the second piston rod 130 to facilitate the switching of the manual emergency pump 100 between the manual mode and the automatic mode, further improving the convenience of use of the manual emergency pump 100.

[0066] Please also read Figure 6 In some embodiments, the manual emergency pump 100 further includes a second joint body 202. One end of the second joint body 202 is sealed and installed in the sliding hole 1211. Specifically, one end of the second joint body 202 is detachably installed in the sliding hole 1211. The second piston rod 130 includes a switching head 131, a guide section 132 and a connecting section 133 connected in sequence. The diameter of the guide section 132 is respectively larger than the diameters of the guide section 132 and the switching head 131. The end surface of the switching head 131 away from the guide section 132 is a conical surface 1311. The guide section 132 is in sliding contact with the inner wall of the sliding hole 1211. The end of the connecting section 133 away from the guide section 132 is slidably arranged in the second joint body 202 and extends to the outside of the second joint body 202. The conical surface 1311 of the switching head 131 abuts against or separates from the opening edge of the first channel 1212 located at one end of the sliding hole 1211 to block or connect the first channel 1212 and the second channel 1213 .

[0067] The second piston rod 130 is provided as a switching head 131, a guiding section 132, and a connecting section 133. When the second piston rod 130 slides in the sliding hole 1211, only the guiding section 132 contacts the inner wall of the sliding hole 1211, which not only guides the sliding of the second piston rod 130 to reduce the contact area between the second piston rod 130 and the inner wall of the sliding hole 1211 and ensure that the movement of the second piston rod 130 in the sliding hole 1211 is smoother. The connecting section 133 is slidably disposed through the second joint body 202 and forms two-point support for the second piston rod 130 together with the guiding section 132 to further improve the stability of the second piston rod 130 during sliding. At the same time, the second joint body 202 also cooperates with the guiding section 132 to limit the extreme position of the second piston rod 130 sliding in the direction from the second end 112 to the first end 111, so as to reduce the probability of the second piston rod 130 disengaging from the first piston rod 120 and further improve the safety and reliability of the manual emergency pump 100.

[0068] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0069] The above-described embodiments merely represent several implementation manners of the present utility model, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A manual emergency pump, characterized in that, Comprising: A body having opposite first and second ends; an operation cavity is provided inside the body; an installation hole is provided on the end face of the first end; an oil inlet hole and an oil outlet hole are spaced apart on the second end; mutually independent first and second oil channels are provided inside the body; one ends of the first oil channel and the second oil channel are respectively communicated with the oil inlet hole and the oil outlet hole; A first piston rod including a rod body having a sliding hole and a piston block provided at one end of the rod body; the piston block is slidably installed in the operation cavity to divide the operation cavity into a first chamber communicated with the installation hole and a second chamber communicated with both the oil inlet hole and the oil outlet hole; one end of the rod body is slidably inserted through the installation hole; a first channel and a second channel are formed at one end of the rod body close to the piston block; one ends of the first channel and the second channel are both communicated with the sliding hole, and the openings of the other ends are both located on the outer surface of the rod body; the rod body can operably drive the piston block to slide in the operation cavity to communicate or disconnect the first channel and the second channel with the first oil channel and the second oil channel respectively; A second piston rod, one end of which is slidably inserted through the sliding hole; the second piston rod can operably slide in the sliding hole to block or conduct the first channel and the second channel; A forward one-way valve, which is hermetically installed in the oil inlet hole and is located between the opening of the first oil channel in the oil inlet hole and the second chamber; A reverse one-way valve, which is hermetically installed in the oil outlet hole and is located between the opening of the second oil channel in the oil outlet hole and the second chamber.

2. The manual emergency pump according to claim 1, wherein The body is a columnar structure; the oil inlet hole and the installation hole are respectively located on the end faces of the first end and the second end; the oil outlet hole is located on the side surface of the body; A first hole section is provided on the end face of the second end; a second hole section communicated with the oil outlet hole is provided on the end face of the second end; a third hole section, a fourth hole section and a fifth hole section are spaced apart on the side surface of the body; the third hole section sequentially communicates the first hole section and the oil inlet hole, and the fourth hole section sequentially communicates the first hole section and the first chamber to form the first oil channel; the fifth hole section sequentially communicates the second hole section and the second chamber to form the second oil channel; Plug heads are hermetically installed at the openings of the first hole section, the second hole section, the third hole section, the fourth hole section and the fifth hole section on the surface of the body.

3. The manual emergency pump according to claim 1, characterized in that, It further includes a first joint body; one end of the first joint body is hermetically installed in the installation hole and extends into the first chamber; one end of the first joint body close to the second end has a first oil passing hole and a second oil passing hole; one ends of the first oil passing hole and the second oil passing hole are respectively communicated with the first oil channel and the second oil channel, and the other ends can be respectively communicated with the first channel and the second channel; one end of the rod body is slidably inserted through the first joint body; the end face of the first joint body facing the second end can be in contact with the piston block.

4. The manual emergency pump according to claim 3, characterized in that, The outer wall of the first joint body is formed with a first annular groove and a second annular groove; the inner wall of the first joint body is formed with a third annular groove and a fourth annular groove; the openings at both ends of the first oil hole are respectively located in the first annular groove and the third annular groove; the openings at both ends of the second oil hole are respectively located in the second annular groove and the fourth annular groove.

5. The manual emergency pump according to claim 3, characterized in that, The first joint body is sleeved with a first annular seal and a second annular seal; the first annular seal is clamped between the first joint body and the opening edge of the mounting hole; the second annular seal is clamped between the first joint body and the inner wall of the first chamber, and is located between the first oil hole and the second oil hole.

6. The manual emergency pump according to claim 3, characterized in that, A third annular seal is arranged between the rod body and the inner wall of the first joint body; the inner wall of the third annular seal is in sliding contact with the outer wall of the rod body.

7. The manual emergency pump according to claim 3, characterized in that, A fourth annular seal is sleeved on the second piston rod; the outer wall of the fourth annular seal is in sliding contact with the inner wall of the sliding hole.

8. The manual emergency pump according to claim 1, wherein It also includes a first hand-held handle; the first hand-held handle is arranged at an end of the rod body away from the piston block along the circumference of the sliding hole and is located outside the main body.

9. The manual emergency pump according to claim 1, characterized in that, A second hand-held handle is installed at the end of the second piston rod located outside the sliding hole.

10. The manual emergency pump according to claim 1, characterized in that, It also includes a second joint body; one end of the second joint body is sealed and installed in the sliding hole; the second piston rod includes a switching head, a guide section and a connecting section connected in sequence; the diameter of the guide section is larger than the diameters of the guide section and the switching head respectively; the end face of the switching head away from the guide section is a conical surface; the guide section is in sliding contact with the inner wall of the sliding hole; the end of the connecting section away from the guide section can be slidably penetrated in the second joint body and extend to the outside of the second joint body; the conical surface of the switching head abuts or separates from the opening edge of the first channel at one end in the sliding hole to block or conduct the first channel and the second channel.

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